Medicare Enrolled
Dr. Paul Diehl, M.D.
Internal Medicine · West Hills, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
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. Diehl 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 →
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What this data tells you about Dr. Diehl
Dr. Paul Diehl is an internal medicine specialist in West Hills, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Diehl performed 21,545 Medicare services across 1,683 unique beneficiaries.
Between the years covered by Open Payments, Dr. Diehl received a total of $2,244 from 27 pharmaceutical and/or device companies across 106 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Diehl 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
$2,244 industry payments
Medicare Practice Summary
Medicare Utilization ↗21,545
Medicare services
Top 1% in CA for internal medicine
1,683
Unique beneficiaries
$19
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,134 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 |
|---|---|---|---|
| Testosterone injection An injection of testosterone cypionate, a form of testosterone hormone. The dose is measured in milligrams. |
17,000 | $0 | $0 |
| 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. |
2,232 | $104 | $175 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
434 | $100 | $250 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
269 | $140 | $250 |
| 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. |
243 | $11 | $35 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
197 | $140 | $225 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
166 | $1 | $25 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
134 | $10 | $85 |
| Nursing facility visit, moderate complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves moderate medical decision making and takes at least 30 minutes. |
114 | $86 | $150 |
| Quadrivalent influenza vaccine, cell-culture derived A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics. |
110 | $33 | $35 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
110 | $33 | $35 |
| 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. |
100 | $144 | $550 |
| Stool test for blood to screen for colon tumors A test that analyzes a stool sample to detect hidden blood, which is used to screen for colon tumors. |
82 | $4 | $20 |
| Hospital discharge day management, 30 minutes or less This service covers the final day of hospital care when the patient is being discharged. It includes coordination of care and instructions for the patient within a time frame of 30 minutes or less. |
72 | $68 | $200 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
67 | $5 | $57 |
| Home health plan of care re-certification A physician reviews the patient's status and contacts the home health agency to re-certify the plan of care without the patient being present. |
49 | $36 | $80 |
| Home health plan of care certification Certification by a physician or allowed practitioner for Medicare-covered home health services under a home health plan of care. This includes contacting the home health agency and reviewing reports of patient status required by physicians. |
38 | $44 | $100 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
31 | $129 | $250 |
| Initial nursing facility care, high complexity An initial visit by a healthcare provider to a patient in a nursing facility involving a high level of medical decision making, lasting at least 45 minutes. |
24 | $145 | $281 |
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
20 | $174 | $400 |
| Blood glucose level test A test that measures the amount of sugar in your blood. |
15 | $4 | $57 |
| Neurobehavioral status exam, first hour A clinical assessment of neurobehavioral status lasting one hour. This evaluation examines mental and behavioral functions. |
14 | $75 | $150 |
| Expiratory airflow and volume test A test that measures the amount of air you can exhale and the speed at which you can breathe it out. It evaluates lung function by assessing expiratory airflow and volume. |
13 | $22 | $140 |
| New patient office visit, complex (60-74 min) | 11 | $151 | $300 |
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.
Industry Payment Transparency
Open Payments through 2024 ↗$2,244
Total received (2018-2024)
Avg $321/year across 7 years
Top 25% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
27
Companies
106
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.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$2,244 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$635
2023
$329
2022
$64
2021
$20
2020
$91
2019
$420
2018
$685
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$289
AstraZeneca Pharmaceuticals LP
$198
GlaxoSmithKline, LLC.
$74
Lilly USA, LLC
$22
Bayer Healthcare Pharmaceuticals Inc.
$19
Amgen Inc.
$18
Almatica Pharma LLC
$15
Top 3 companies account for 88.3% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$396
ABBVIE INC.
$301
Amgen Inc.
$300
Janssen Pharmaceuticals, Inc
$229
Lilly USA, LLC
$160
AbbVie Inc.
$89
GlaxoSmithKline, LLC.
$74
PFIZER INC.
$60
ACADIA Pharmaceuticals Inc
$60
Indivior Inc.
$60
Novartis Pharmaceuticals Corporation
$58
Novo Nordisk Inc
$54
Abbott Laboratories
$48
Allergan Inc.
$34
PORTOLA PHARMACEUTICALS, INC.
$32
Boehringer Ingelheim Pharmaceuticals, Inc.
$32
Bayer HealthCare Pharmaceuticals Inc.
$31
ARBOR PHARMACEUTICALS, INC.
$30
Supernus Pharmaceuticals, Inc.
$30
Merck Sharp & Dohme Corporation
$29
Medtronic Vascular, Inc.
$23
Avanir Pharmaceuticals, Inc.
$23
Takeda Pharmaceuticals U.S.A., Inc.
$21
SUN PHARMACEUTICAL INDUSTRIES INC.
$20
Bayer Healthcare Pharmaceuticals Inc.
$19
Astellas Pharma US Inc
$18
Almatica Pharma LLC
$15
Top 3 companies account for 44.4% of all-time payments
Associated products mentioned in payments ›
AIRSUPRA · AREXVY · Aimovig · BEVYXXA · BREZTRI · BRILINTA · BYDUREON · BYSTOLIC · ENTRESTO · EVENITY · EZALLOR SPRINKLE · Edarbi · FARXIGA · FREESTYLE LIBRE 2 · JANUVIA · JARDIANCE · Kerendia · LOREEV XR · MOUNJARO · MYRBETRIQ · NUEDEXTA · NUPLAZID · Otezla · Ozempic · PAXLOVID · PREVNAR - 13 · Prolia · Repatha · SPIRIVA RESPIMAT · SUBLOCADE · TRELEGY ELLIPTA · TROKENDI XR · Trintellix · UBRELVY · VRAYLAR · VenaSeal · Victoza · XARELTO
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 →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Internal medicine physicians within 10 mi
2,991
Per 100K population
30.4
County median income
$87,760
Nearest hospital
UCLA WEST VALLEY MEDICAL CENTER
0.0 mi
0.0 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. Diehl is a mixed practice specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement, 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. Diehl experienced with testosterone injection?
Based on Medicare claims data, Dr. Diehl performed 17,000 testosterone injection 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. Diehl receive payments from pharmaceutical companies?
Yes. Dr. Diehl received a total of $2,244 from 27 companies across 106 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. Diehl's costs compare to other internal medicine physicians in West Hills?
Dr. Diehl's average Medicare payment per service is $19. 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. Diehl) 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 →
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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.
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