Medicare Enrolled
Dr. Charles Shang, MD
Internal Medicine · Grass Valley, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
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. Shang 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. Shang
Dr. Charles Shang is an internal medicine specialist in Grass Valley, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Shang performed 9,983 Medicare services across 4,966 unique beneficiaries.
Between the years covered by Open Payments, Dr. Shang received a total of $1,950 from 31 pharmaceutical and/or device companies across 78 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. Shang 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.
✓ 20 years in practice
▲ Top 2% volume in CA
$1,950 industry payments
Medicare Practice Summary
Medicare Utilization ↗9,983
Medicare services
Top 2% in CA for internal medicine
4,966
Unique beneficiaries
$75
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~499 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 |
|---|---|---|---|
| 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. |
3,391 | $95 | $167 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
652 | $49 | $82 |
| Chronic care management, additional 20 min/month This service covers an extra 20 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions each calendar month. |
529 | $38 | $62 |
| Additional chronic care management time, 60 minutes This service covers an additional 60 minutes of clinical staff time directed by a healthcare professional for managing two or more chronic conditions, billed per calendar month. |
460 | $58 | $91 |
| Nursing facility visit, low complexity A daily follow-up visit for an existing patient in a nursing facility involving straightforward medical decision making. The visit requires at least 15 minutes of time if time is used to determine the level of care. |
407 | $58 | $88 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
388 | $134 | $171 |
| Annual alcohol misuse screening, 5 to 15 minutes | 381 | $20 | $25 |
| Annual depression screening | 378 | $20 | $24 |
| 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. |
352 | $85 | $116 |
| Nursing facility visit, high complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves a high level of medical decision making and takes at least 45 minutes. |
350 | $122 | $171 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
256 | $83 | $109 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
216 | $32 | $40 |
| 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. |
202 | $11 | $31 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
189 | $76 | $85 |
| Complex chronic care management, first 60 minutes This service involves clinical staff time directed by a healthcare professional to manage two or more chronic conditions over a calendar month. It covers the first 60 minutes of this coordinated care effort. |
185 | $108 | $174 |
| 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. |
172 | $67 | $118 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
148 | $67 | $118 |
| Home visit, established patient, low complexity A physician visits an existing patient at their residence to provide care involving a low level of medical decision making. The visit lasts at least 30 minutes. |
139 | $54 | $106 |
| Smoking cessation counseling, 4-10 minutes A brief counseling session focused on helping patients quit smoking and tobacco use. The provider spends 4 to 10 minutes discussing strategies and support for cessation. |
108 | $15 | $20 |
| 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. |
94 | $138 | $235 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
84 | $68 | $111 |
| 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. |
72 | $145 | $210 |
| COVID-19 vaccine administration Administration of a single dose of the coronavirus vaccine. |
70 | $43 | $50 |
| COVID-19 vaccine (Moderna bivalent) An intramuscular injection of the SARS-CoV-2 vaccine containing 50 micrograms in a 0.5 mL dose. |
70 | $143 | $200 |
| 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. |
66 | $88 | $217 |
| Balance and posture test A test to evaluate a patient's balance and posture. This assessment measures stability and body alignment. |
60 | $39 | $65 |
| 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. |
58 | $12 | $25 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
47 | $1 | $2 |
| Home visit, established patient, moderate complexity A home visit for an established patient involving moderate medical decision making. The visit requires at least 40 minutes of time if time is used to determine the level of service. |
44 | $96 | $164 |
| Neurobehavioral status exam, first hour A clinical assessment of neurobehavioral status lasting one hour. This evaluation examines mental and behavioral functions. |
43 | $75 | $123 |
| Ultrasound of head and neck blood flow, bilateral An ultrasound exam that uses sound waves to visualize and assess blood flow in the vessels of both the head and the neck. |
39 | $151 | $262 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
35 | $226 | $364 |
| Nursing facility visit, established patient, straightforward A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves straightforward medical decision making and lasts at least 10 minutes. |
33 | $29 | $56 |
| 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. |
29 | $33 | $40 |
| Adm sarscv2 bvl 50mcg/.5ml a | 27 | $43 | $75 |
| Pneumococcal conjugate vaccine (PCV20) An intramuscular injection of the 20-valent pneumococcal conjugate vaccine. It is used to protect against diseases caused by Streptococcus pneumoniae bacteria. |
23 | $282 | $350 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
23 | $32 | $50 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
21 | $36 | $62 |
| Echocardiogram, transthoracic An ultrasound of the heart that uses color to show blood flow, rate, direction, and valve function. |
21 | $157 | $269 |
| New patient office visit, complex (60-74 min) | 20 | $111 | $286 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
19 | $3 | $30 |
| Ultrasound of abdominal aorta An imaging test that uses sound waves to create pictures of the abdominal aorta, the large blood vessel that carries blood from the heart to the lower body. |
18 | $114 | $146 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
15 | $82 | $148 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
14 | $101 | $160 |
| Nursing facility discharge management, more than 30 minutes This service involves care coordination and management activities performed by a healthcare professional to prepare a patient for discharge from a nursing facility. It requires more than 30 minutes of time spent on these activities. |
12 | $104 | $132 |
| Telephone medical discussion, 5-10 minutes A phone conversation with a physician lasting between 5 and 10 minutes to discuss medical matters. |
12 | $47 | $73 |
| Home visit, established patient, straightforward decision making A home visit for an established patient involving straightforward medical decision making. The visit lasts at least 15 minutes when time is used to determine the level of service. |
11 | $7 | $70 |
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.
0.2% high complexity
2.8% medium
97.0% routine
Industry Payment Transparency
Open Payments through 2024 ↗$1,950
Total received (2018-2024)
Avg $390/year across 5 years
Top 26% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
31
Companies
78
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
$1,950 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$132
2023
$251
2022
$667
2021
$652
2018
$248
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Exact Sciences Corporation
$50
GlaxoSmithKline, LLC.
$44
Novartis Pharmaceuticals Corporation
$25
Dexcom, Inc.
$13
Top 3 companies account for 89.9% of 2024 payments
All-time payments by company (2018-2024) ›
Novo Nordisk Inc
$296
GlaxoSmithKline, LLC.
$160
Sirtex Medical Inc
$148
Boehringer Ingelheim Pharmaceuticals, Inc.
$143
Novartis Pharmaceuticals Corporation
$130
AbbVie Inc.
$122
Exact Sciences Corporation
$116
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$113
AstraZeneca Pharmaceuticals LP
$100
Stryker Corporation
$76
PFIZER INC.
$66
ABBVIE INC.
$54
ZOLL Services LLC (A/K/A ZOLL LifeCor Corp)
$42
Biohaven Pharmaceuticals, Inc.
$41
E.R. Squibb & Sons, L.L.C.
$33
Almatica Pharma LLC
$30
ACADIA Pharmaceuticals Inc
$29
Amneal Pharmaceuticals LLC
$29
Sobi, Inc
$27
Philips Electronics North America Corporation
$19
Actelion Pharmaceuticals US, Inc.
$18
Kyowa Kirin, Inc.
$17
Bayer HealthCare Pharmaceuticals Inc.
$17
Bayer Healthcare Pharmaceuticals Inc.
$16
Neurocrine Biosciences, Inc.
$16
Abbott Laboratories
$16
IDORSIA PHARMACEUTICALS US INC
$16
Sun Pharmaceutical Industries Inc.
$16
Janssen Pharmaceuticals, Inc
$15
Biohaven Pharmaceutical Holding Company Ltd.
$14
Dexcom, Inc.
$13
Top 3 companies account for 31.0% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · BREZTRI · CREON · Cologuard Collection Kit · DOPTELET · Dexcom G6 Transmitter · ELIQUIS · ENTRESTO · EZALLOR SPRINKLE · FARXIGA · FREESTYLE LIBRE 2 · GRALISE · INGREZZA · JARDIANCE · Kerendia · LEQVIO · LINZESS · LOKELMA · LOREEV XR · LifeVest · NOURIANZ · NUPLAZID · NURTEC ODT · OPSUMIT · Ozempic · PREVNAR 20 · QUVIVIQ · RYBELSUS · RYTARY · Rybelsus · SHINGRIX · SIR-Spheres Microspheres · TRELEGY ELLIPTA · TRIATHLON · VIBERZI · XARELTO · XIFAXAN
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
71
Per 100K population
69.3
County median income
$84,905
Nearest hospital
SIERRA NEVADA MEMORIAL HOSPITAL
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. Shang is a clinical cardiology specialist, with above-average Medicare volume (top 2% in CA), with low-engagement industry engagement, with 20 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. Shang experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Shang performed 3,391 office visit, established patient (30-39 min) 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. Shang receive payments from pharmaceutical companies?
Yes. Dr. Shang received a total of $1,950 from 31 companies across 78 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. Shang's costs compare to other internal medicine physicians in Grass Valley?
Dr. Shang's average Medicare payment per service is $75. 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. Shang) 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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