Medicare Enrolled

Dr. Ann Wexler, MD

Optician · Berkeley, CA
Practice pattern: Mixed Practice — Diverse clinical practice across multiple procedure types
Speaking/Promotional
2001 DWIGHT WAY, Berkeley, CA 94704
5102046402
In practice since 2006 (19 years)
NPI: 1669482576 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Wexler from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Wexler? Request a correction or review of any data shown here. Provider portal →

What this data tells you about Dr. Wexler

Dr. Ann Wexler is an optician specialist in Berkeley, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Wexler performed 118,678 Medicare services across 2,972 unique beneficiaries.

Between the years covered by Open Payments, Dr. Wexler received a total of $62,020 from 100 pharmaceutical and/or device companies across 1256 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in optician. The majority of payments are for speaking programs and promotional activities, reflecting participation in industry-sponsored events. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Wexler is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 19 years in practice ▲ Top 1% volume in CA $62,020 industry payments

Medicare Practice Summary

Medicare Utilization ↗
118,678
Medicare services
Top 1% in CA for optician
2,972
Unique beneficiaries
$6
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~6,246 Medicare services per year of practice

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Iron infusion (Feraheme)
An injection of ferumoxytol used to treat iron deficiency anemia in patients not on dialysis.
41,310 $0 $1
Filgrastim injection (Nivestym) for white blood cells
An injection of the biosimilar medication filgrastim-aafi (Nivestym) at a dose of 1 microgram.
28,142 $0 $1
Denosumab injection (Prolia/Xgeva) 9,729 $18 $30
Injection, heparin sodium, (heparin lock flush), per 10 units 8,920 $0 $1
Epoetin alfa injection (Procrit) for anemia
An injection of epoetin alfa containing 1000 units for use in patients not on end-stage renal disease (ESRD) dialysis.
8,040 $6 $20
Injection, granisetron hydrochloride, 100 mcg 3,011 $0 $4
Blood draw (venipuncture)
Insertion of a needle into a vein to collect a blood sample.
1,859 $8 $20
Office visit, established patient (30-39 min)
A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition.
1,849 $110 $300
Complete blood count (CBC) with differential
An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells.
1,789 $8 $40
Dexamethasone injection (steroid)
An injection of dexamethasone sodium phosphate, a corticosteroid medication, administered in a dose of 1 milligram.
1,602 $0 $2
Intravenous injection of additional new drug or substance
Administration of an additional new medication or substance directly into a vein.
1,587 $15 $80
Basic metabolic blood panel
A blood test that measures a group of basic chemicals, including total calcium levels.
1,356 $8 $40
Anti-nausea injection (Aloxi/palonosetron) 900 $1 $50
Liver function blood test panel 844 $8 $30
Drug injection, under skin or into muscle
A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle.
834 $13 $64
Normal saline infusion, 250 cc
Administration of 250 cubic centimeters of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater fluid.
826 $1 $5
Additional hour of intravenous hydration
This code represents each additional hour of intravenous fluid administration beyond the initial hour. It is used to bill for extended hydration therapy.
536 $12 $64
Magnesium level test
A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess.
463 $7 $40
Normal saline infusion, 500 ml
Administration of sterile normal saline solution through an intravenous line. This procedure involves the infusion of a 500 ml unit of the solution.
432 $1 $8
Ferritin level test (iron stores)
A blood test that measures the level of ferritin, a protein that stores iron in the body.
423 $13 $50
Intravenous infusion, 1 hour or less
Administration of medication or fluid directly into a vein for therapeutic, preventive, or diagnostic purposes. The procedure lasts one hour or less.
377 $63 $200
Unclassified drug
A medication that does not fit into standard HCPCS or CPT classification categories.
370 $1 $10
Hospital follow-up visit, moderate complexity
Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service.
364 $67 $121
Vitamin B-12 injection
An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg.
346 $1 $7
Intravenous chemotherapy infusion, 1 hour or less
Administration of chemotherapy medication directly into a vein. The procedure takes one hour or less to complete.
267 $130 $400
Additional hour of intravenous infusion
This code represents each additional hour of intravenous infusion beyond the initial hour for therapy, prevention, or diagnosis.
265 $20 $80
Intravenous drug injection
A procedure involving the administration of a medication or substance directly into a vein.
260 $36 $160
Lactate dehydrogenase (LDH) level test
A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease.
244 $6 $30
Vitamin B-12 level test
A blood test that measures the amount of vitamin B-12 in your body.
236 $15 $80
Folic acid level test
A blood test that measures the amount of folic acid in the serum.
175 $14 $60
Diphenhydramine injection, up to 50 mg
An injection of diphenhydramine hydrochloride, an antihistamine medication, administered in a dose of up to 50 milligrams.
173 $1 $8
Office visit, established patient (20-29 min)
An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition.
157 $55 $200
Carcinoembryonic antigen (CEA) level test
A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer.
145 $19 $60
Normal saline infusion, 1000 cc
Administration of 1000 cc of normal saline solution into a vein. This procedure involves the intravenous delivery of a sterile saltwater solution.
130 $2 $5
Additional sequential IV infusion, 1 hour or less
This code represents an additional intravenous infusion administered sequentially to a primary infusion. It covers the administration time of one hour or less.
117 $28 $100
Comprehensive metabolic blood panel
A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers.
87 $10 $60
Intravenous infusion of new drug or substance, 1 hour or less
This procedure involves administering a new medication or substance directly into a vein through an existing access site. The infusion is completed within one hour or less.
85 $64 $184
Additional hour of intravenous chemotherapy
This code represents the administration of chemotherapy medication into a vein for each additional hour beyond the initial period.
84 $27 $100
Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 59 $20 $80
Immunologic analysis for detection of tumor antigen, quantitative; ca 125 59 $20 $80
Initial hospital admission, high complexity
Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter.
52 $142 $350
Intravenous hydration infusion, 31-60 minutes
Administration of fluids into a vein to maintain hydration. This procedure involves an infusion lasting between 31 and 60 minutes.
50 $32 $175
Home health agency supervision, complex multidisciplinary care
Supervision by a physician or allowed practitioner for a patient receiving Medicare-covered services from a participating home health agency. This involves complex and multidisciplinary care modalities, with the patient not present during the supervision.
36 $88 $220
Thyroid stimulating hormone (TSH) test
A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function.
25 $16 $75
New patient office visit, complex (60-74 min) 25 $178 $398
Free thyroxine (T4) test
A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream.
24 $9 $60
Prothrombin time test (blood clotting)
A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process.
14 $4 $15
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
37.0% high complexity
53.6% medium
9.4% routine

Industry Payment Transparency

Open Payments through 2024 ↗
$62,020
Total received (2018-2024)
Avg $8,860/year across 7 years
Top 4% in CA for optician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
100
Companies
1,256
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →

Payment profile

Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.

Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$31,034 (50.0%)
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$25,071 (40.4%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$5,915 (9.5%)

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$7,147
2023
$5,734
2022
$10,201
2021
$18,910
2020
$13,723
2019
$3,070
2018
$3,235

Payments by company (2024)

Consulting
Speaking
Meals & Travel
Research
ADC Therapeutics America, Inc.
$2,072
AstraZeneca Pharmaceuticals LP
$407
Lilly USA, LLC
$358
Janssen Biotech, Inc.
$343
Merck Sharp & Dohme LLC
$331
PFIZER INC.
$311
Daiichi Sankyo Inc.
$269
Celgene Corporation
$265
Novartis Pharmaceuticals Corporation
$260
Genentech USA, Inc.
$216
Eisai Inc.
$211
Gilead Sciences, Inc.
$184
Takeda Pharmaceuticals U.S.A., Inc.
$184
GlaxoSmithKline, LLC.
$174
Alexion Pharmaceuticals, Inc.
$142
ABBVIE INC.
$108
US Oncology Corporate, Inc.
$102
PharmaEssentia USA Corporation
$95
ARRAY BIOPHARMA INC
$82
E.R. Squibb & Sons, L.L.C.
$81
Stemline Therapeutics Inc.
$80
GENZYME CORPORATION
$73
SERVIER PHARMACEUTICALS LLC
$68
Karyopharm Therapeutics Inc.
$67
Incyte Corporation
$66
Deciphera Pharmaceuticals Inc.
$60
Rigel Pharmaceuticals, Inc.
$58
BeiGene USA, Inc.
$52
SpringWorks Therapeutics, Inc.
$44
Regeneron Healthcare Solutions, Inc.
$44
Aveo Pharmaceuticals, Inc.
$43
Mirati Therapeutics, Inc.
$33
TAIHO ONCOLOGY, INC.
$31
Immunocore Limited
$31
SOBI, INC
$28
Acrotech Biopharma Inc.
$28
Kyowa Kirin, Inc.
$26
MorphoSys, US Inc.
$24
Biocon Biologics Inc
$22
Verity Pharmaceuticals Inc.
$21
Azurity Pharmaceuticals, Inc.
$19
Bayer Healthcare Pharmaceuticals Inc.
$19
Spectrum Pharmaceuticals Inc.
$17
Top 3 companies account for 39.7% of 2024 payments
All-time payments by company (2018-2024) ›
Lilly USA, LLC
$32,013
Celgene Corporation
$3,854
ADC Therapeutics America, Inc.
$2,096
PFIZER INC.
$1,555
AstraZeneca Pharmaceuticals LP
$1,370
Janssen Biotech, Inc.
$1,227
Novartis Pharmaceuticals Corporation
$1,200
Takeda Pharmaceuticals U.S.A., Inc.
$1,060
Amgen Inc.
$923
Genentech USA, Inc.
$871
E.R. Squibb & Sons, L.L.C.
$791
Seagen Inc.
$781
Merck Sharp & Dohme LLC
$708
Eisai Inc.
$704
Astellas Pharma US Inc
$702
GENZYME CORPORATION
$701
GlaxoSmithKline, LLC.
$641
Gilead Sciences, Inc.
$571
Daiichi Sankyo Inc.
$569
Kite Pharma, Inc.
$522
Merck Sharp & Dohme Corporation
$490
Incyte Corporation
$469
TESARO, Inc.
$417
Alexion Pharmaceuticals, Inc.
$371
Pharmacyclics LLC, An AbbVie Company
$370
Regeneron Healthcare Solutions, Inc.
$361
McKesson Specialty Care Distribution, LLC
$316
US Oncology Corporate, Inc.
$276
Karyopharm Therapeutics Inc.
$264
BeiGene USA, Inc.
$245
Rigel Pharmaceuticals, Inc.
$228
Exelixis Inc.
$219
ARRAY BIOPHARMA INC
$207
Bayer HealthCare Pharmaceuticals Inc.
$201
JAZZ PHARMACEUTICALS INC.
$179
Stemline Therapeutics Inc.
$173
Mirati Therapeutics, Inc.
$172
Clovis Oncology, Inc.
$160
EISAI INC.
$159
EMD Serono, Inc.
$147
Emmaus Medical, Inc.
$143
Pharmacyclics LLC, an AbbVie Company
$140
Taiho Oncology, Inc.
$137
Myovant Sciences Inc.
$130
Acrotech Biopharma LLC
$124
Kyowa Kirin, Inc.
$122
PharmaEssentia USA Corporation
$121
Foundation Medicine, Inc.
$117
Boehringer Ingelheim Pharmaceuticals, Inc.
$115
Jazz Pharmaceuticals Inc.
$113
Deciphera Pharmaceuticals Inc.
$112
SERVIER PHARMACEUTICALS LLC
$109
ABBVIE INC.
$108
Dendreon Pharmaceuticals LLC
$106
Epizyme, Inc.,
$101
Apellis Pharmaceuticals, Inc.
$95
SOBI, INC
$88
Agios Pharmaceuticals, Inc.
$87
Myriad Genetic Laboratories, Inc.
$87
Sobi, Inc
$86
MorphoSys, US Inc.
$85
Ipsen Biopharmaceuticals, Inc
$82
AVEO Pharmaceuticals, Inc.
$77
Lexicon Pharmaceuticals, Inc.
$75
TAIHO ONCOLOGY, INC.
$73
Aveo Pharmaceuticals, Inc.
$68
Blueprint Medicines Corporation
$68
Spectrum Pharmaceuticals Inc.
$68
AMAG Pharmaceuticals, Inc.
$68
Heron Therapeutics, Inc.
$64
Sumitomo Pharma America, Inc.
$59
Acceleron Pharma, Inc.
$48
Teva Pharmaceuticals USA, Inc.
$47
Pharmacosmos Therapeutics Inc.
$45
SpringWorks Therapeutics, Inc.
$44
Global Blood Therapeutics, Inc.
$35
Mylan Institutional Inc.
$35
Immunocore Limited
$31
Octapharma USA, Inc.
$28
Acrotech Biopharma Inc.
$28
Seattle Genetics, Inc.
$26
PUMA BIOTECHNOLOGY, INC.
$25
TerSera Therapeutics LLC
$24
Janssen Pharmaceuticals, Inc
$24
Biocon Biologics Inc
$22
Verity Pharmaceuticals Inc.
$21
Alnylam Pharmaceuticals Inc.
$21
Dova Pharmaceuticals
$20
Azurity Pharmaceuticals, Inc.
$19
Bayer Healthcare Pharmaceuticals Inc.
$19
Helsinn Therapeutics (U.S.), Inc.
$19
MEDIVATION FIELD SOLUTIONS LLC
$18
GE HealthCare
$18
AbbVie Inc.
$16
Organon LLC
$15
Servier Pharmaceuticals LLC
$14
Advanced Accelerator Applications
$12
TOLMAR Pharmaceuticals, Inc.
$12
Secura Bio, Inc.
$12
GE HEALTHCARE
$12
Top 3 companies account for 61.2% of all-time payments
Associated products mentioned in payments ›
ADCETRIS · AFINITOR · AKYNZEO · ALUNBRIG · AYVAKIT · Abraxane · Alecensa · Aliqopa · Aranesp · Avastin · BELEODAQ · BENDEKA · BESREMI · BLENREP · BOSULIF · BRAC CDx · BRACAnalysis · BRAFTOVI · BRUKINSA · Bavencio · CABLIVI · CABOMETYX · CALQUENCE · CARVYKTI · CINVANTI · COSELA · CYRAMZA · Cabometyx · Cinvanti · DARZALEX · DOPTELET · Doptelet · ELIGARD · ELIQUIS · ELITEK · ELREXFIO · EMPLICITI · ENHERTU · EPKINLY · ERLEADA · Empaveli · Endari · Enhertu · FARYDAK · FERAHEME · FOTIVDA · FOUNDATIONONE · FRUZAQLA · Fabhalta · Folotyn · Fulphila · GATTEX · GAZYVA · GILOTRIF · GIVLAARI · HEMADY · Hemlibra · IBRANCE · ICLUSIG · IDHIFA · IMBRUVICA · IMFINZI · INJECTAFER · INLYTA · INQOVI · Imbruvica · Itovebi · JADENU · JAKAFI · JAYPIRCA · JEMPERLI · JEVTANA · KANJINTI · KEYTRUDA · KIMMTRAK · KISQALI · KRAZATI · Kadcyla · Kyprolis · LIBTAYO · LONSURF · LORBRENA · LUMAKRAS · LYNPARZA · Lenvima · Lonsurf · Lunsumio · Lutathera · MEKINIST · MONJUVI · MONOFERRIC · MVASI · MYLOTARG · NERLYNX · NINLARO · Neulasta · Nplate · Nubeqa · OCTAGAM IMMUNE GLOBULIN (HUMAN) · OGSIVEO · ONTRUZANT · OPDIVO · OPDUALAG · ORGOVYX · OXBRYTA · Ogivri · Orserdu · PADCEV · PEMAZYRE · PIQRAY · PLUVICTO · POTELIGEO · PROMACTA · PROVENGE · Padcev · Perjeta · Phesgo · Pomalyst · Poteligeo · PreciseTumor · Prolia · QINLOCK · REBLOZYL · RETEVMO · ROLVEDON · RYBREVANT · RYDAPT · Reblozyl · Revlimid · Rezlidhia · Rubraca · SANDOSTATIN · SARCLISA · SCEMBLIX · SOMATULINE DEPOT · SPRYCEL · SUSTOL · SUTENT · Stivarga · TAGRISSO · TASIGNA · TAZVERIK · TECENTRIQ · TECVAYLI · TIBSOVO · TIVDAK · TUKYSA · Tavalisse · Tecentriq · Tibsovo · Trelstar · Trodelvy · ULTOMIRIS · Ultomiris · VARUBI · VENCLEXTA · VERZENIO · VIVIMUSTA · VONJO · VOTRIENT · VYXEOS · Venclexta · Vitrakvi · XALKORI · XARELTO · XOSPATA · XPOVIO · XTANDI · Xermelo · Xospata · Yescarta · ZEJULA · ZEPZELCA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →

The majority of payments (50%) are for speaking programs and promotional activities, which reflect participation in industry-sponsored educational or marketing events. This is common in optician and does not inherently indicate bias, but patients may wish to be aware. Total industry engagement is in the top 4% for optician in CA.

Looking for an optician specialist in Berkeley?
Compare opticians in the Berkeley area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Opticians within 10 mi
1,338
Per 100K population
81.0
County median income
$126,240
Nearest hospital
ALTA BATES SUMMIT MEDICAL CENTER - ALTA BATES CAMP
1.2 mi

Data Sources

Provider Registry NPPES Weekly updates
Medicare Enrollment PECOS Monthly updates
Practice Data Medicare Util. Annual (CY lag)
Industry Payments Open Payments CY 2024
Disciplinary History — Not public N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →

Summary

Dr. Wexler is a mixed practice specialist, with above-average Medicare volume (top 1% in CA), with speaking/promotional industry engagement in the top 4% of CA peers, with 19 years of NPI registration.

This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →

Frequently Asked Questions

Is Dr. Wexler experienced with iron infusion (feraheme)?
Based on Medicare claims data, Dr. Wexler performed 41,310 iron infusion (feraheme) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Wexler receive payments from pharmaceutical companies?
Yes. Dr. Wexler received a total of $62,020 from 100 companies across 1,256 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Wexler's costs compare to other opticians in Berkeley?
Dr. Wexler's average Medicare payment per service is $6. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Wexler) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
About this page

All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Payments from industry are legal and do not indicate wrongdoing. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →