Doctor profile · Federal record
Dr. Mark Sarnak, M.D.
Nephrology Physician (CMS: Nephrology) · Boston, MA
- NPI 1982641502
- Accepts Medicare
- 33 yrs in practice
- Male
- No sanctions
Practice & contact
- Primary practice
-
750 Washington St, Tufts- New England Medical Center
Boston, MA 021111526
(617) 636-5866
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- Massachusetts #82001
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1982641502. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
407
Distinct HCPCS
7
Medicare allowed
$42,190
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 131 | 68 | $101 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 120 | 58 | $81 | |
90945 |
Dialysis procedure including 1 evaluation | 48 | 16 | $90 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 47 | 26 | $122 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 37 | 34 | $181 | |
99238 |
Hospital discharge day management, 30 minutes or less | 13 | 13 | $70 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 11 | 11 | $139 |
In context: peer comparison
Among 73 peers in this city , average services per provider: 137. This provider delivers 3.0× the peer median.Open Payments
Industry payments received
All-time total
$5,729
Transactions
9
Manufacturers
3
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| AstraZeneca UK Limited | 3 | $3,000.00 | |
| AKEBIA THERAPEUTICS INC | 4 | $2,700.00 | |
| Travere Therapeutics, Inc. | 2 | $28.66 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
15
Patients
0
Total drug cost
$7,429
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Procrit (Epoetin Alfa) | Brand | 15 | 0 | $7,429 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Sarnak's medical specialty?
Dr. Mark Sarnak practices Nephrology Physician in Boston, MA.
Where does Dr. Mark Sarnak practice?
Dr. Mark Sarnak practices at 750 Washington St, Boston, MA 021111526. Office phone: 6176365866.
What is Dr. Mark Sarnak's NPI?
Dr. Mark Sarnak's National Provider Identifier (NPI) is 1982641502, issued by NPPES.
Does Dr. Mark Sarnak accept Medicare assignment?
Yes. Dr. Mark Sarnak accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Sarnak commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Dialysis procedure including 1 evaluation (HCPCS 90945). Source: CMS Medicare Physician & Other Practitioners file.