Doctor profile · Federal record
Dr. Gregory Marcus, MD
Clinical Cardiac Electrophysiology Physician (CMS: Cardiovascular Disease (Cardiology)) · Internal Medicine Physician · Cardiovascular Disease Physician · San Francisco, CA
- NPI 1891720579
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 28 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
505 Parnassus Ave
San Francisco, CA 941432204
(415) 353-8870 - Mailing address
-
1635 Divisadero St Ste 625 Box 1821
San Francisco, CA 941430001
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- April 24, 2017
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207RC0001X — NUCC code
- State license (1)
- California #A69390
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1891720579. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
850
Distinct HCPCS
7
Medicare allowed
$39,843
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 356 | 258 | $9 | |
93294 |
Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days | 174 | 49 | $34 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 116 | 94 | $162 | |
93295 |
Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days | 75 | 22 | $41 | |
93280 |
Programming of dual lead pacemaker system | 50 | 31 | $42 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 47 | 46 | $9 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 32 | 32 | $198 |
In context: peer comparison
Among 6 peers in San Francisco Clinical Cardiac Electrophysiology Physician, average services per provider: 129. This provider delivers 6.6× the peer median.Open Payments
Industry payments received
All-time total
$314
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, INC. | 1 | $163.69 | |
| Abbott Laboratories | 1 | $150.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
166
Patients
36
Total drug cost
$88,954
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Eliquis (Apixaban) | Brand | 64 | 23 | $85,077 |
| Metoprolol Succinate | Generic | 41 | 13 | $1,219 |
| Amiodarone Hcl | Generic | 23 | 0 | $833 |
| Diltiazem 24Hr ER (Cd) (Diltiazem Hcl) | Brand | 19 | 0 | $778 |
| Flecainide Acetate | Generic | 19 | 0 | $1,047 |
Hospital affiliations
Frequently asked questions
What is Dr. Gregory Marcus's medical specialty?
Dr. Gregory Marcus practices Clinical Cardiac Electrophysiology Physician in San Francisco, CA.
Where does Dr. Gregory Marcus practice?
Dr. Gregory Marcus practices at 505 Parnassus Ave, San Francisco, CA 941432204. Office phone: 4153538870.
What is Dr. Gregory Marcus's NPI?
Dr. Gregory Marcus's National Provider Identifier (NPI) is 1891720579, issued by NPPES.
Does Dr. Gregory Marcus accept Medicare assignment?
Yes. Dr. Gregory Marcus accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gregory Marcus commonly perform?
Top Medicare-reported procedures in 2023: Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (HCPCS 93010); Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days (HCPCS 93294); Established patient office or other outpatient visit (HCPCS 99215). Source: CMS Medicare Physician & Other Practitioners file.