Doctor profile · Federal record
Dr. Nerissa Ko, M.D.
Neurology Physician (CMS: Neurology) · San Francisco, CA
- NPI 1821029059
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 31 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
400 Parnassus Ave Fl 8
San Francisco, CA 941432202
(415) 353-1489
fax (415) 353-8705 - Mailing address
-
1635 Divisadero St, Suite 625, Box 1821
San Francisco, CA 941430001
Credentials & registration
- NPI registered
- July 2006 — 20 yrs on file
- Profile last updated
- July 23, 2008
- Year of graduation
- 1995 — 31 yrs since
- Specialty taxonomy
- 2084N0400X — NUCC code
- State license (1)
- California #A62792
- Medicaid
- CA #00A627920
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821029059. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
472
Distinct HCPCS
7
Medicare allowed
$49,583
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
93880 |
Ultrasound of both sides of head and neck blood flow | 238 | 234 | $42 | |
99291 |
Critical care, first 30-74 minutes | 93 | 33 | $235 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 47 | 16 | $134 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 36 | 21 | $89 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 27 | 22 | $162 | |
99239 |
Hospital discharge day management, more than 30 minutes | 20 | 20 | $130 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 11 | 11 | $110 |
In context: peer comparison
Among 69 peers in San Francisco Neurology Physician, average services per provider: 156. This provider delivers 3.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
74
Patients
13
Total drug cost
$827
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 30 | 13 | $484 |
| Sertraline Hcl | Generic | 17 | 0 | $38 |
| Clopidogrel (Clopidogrel Bisulfate) | Brand | 14 | 0 | $221 |
| Losartan Potassium | Generic | 13 | 0 | $83 |
Hospital affiliations
Frequently asked questions
What is Dr. Nerissa Ko's medical specialty?
Dr. Nerissa Ko practices Neurology Physician in San Francisco, CA.
Where does Dr. Nerissa Ko practice?
Dr. Nerissa Ko practices at 400 Parnassus Ave Fl 8, San Francisco, CA 941432202. Office phone: 4153531489.
What is Dr. Nerissa Ko's NPI?
Dr. Nerissa Ko's National Provider Identifier (NPI) is 1821029059, issued by NPPES.
Does Dr. Nerissa Ko accept Medicare assignment?
Yes. Dr. Nerissa Ko accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Nerissa Ko commonly perform?
Top Medicare-reported procedures in 2023: Ultrasound of both sides of head and neck blood flow (HCPCS 93880); Critical care (HCPCS 99291); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.