Doctor profile · Federal record
Dr. James Maas, M.D. PH.D.
Neurology Physician (CMS: Neurology) · San Francisco, CA
- NPI 1255506788
- Accepts Medicare
- MIPS 70.8 / 100 · 2023
- 20 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
505 Parnassus Avenue, UCSF Department of Neurology
San Francisco, CA 941430114
(415) 476-1489 - Mailing address
-
505 Parnassus Avenue Box 0114, UCSF Department of Neurology
San Francisco, CA 941430114
Credentials & registration
- NPI registered
- April 2008 — 18 yrs on file
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 2084N0400X — NUCC code
- State license (1)
- California #A102712
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1255506788. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
271
Distinct HCPCS
5
Medicare allowed
$33,763
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 111 | 72 | $162 | |
G2212 |
Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 51 | 27 | $35 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 46 | 39 | $110 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 33 | 33 | $203 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 30 | 21 | $74 |
In context: peer comparison
Among 69 peers in San Francisco Neurology Physician, average services per provider: 156. This provider delivers 1.7× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
693
Patients
135
Total drug cost
$262,173
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Carbidopa-Levodopa (Carbidopa/Levodopa) | Brand | 216 | 66 | $14,247 |
| Rytary (Carbidopa/Levodopa) | Brand | 101 | 15 | $142,817 |
| Carbidopa-Levodopa ER (Carbidopa/Levodopa) | Brand | 93 | 29 | $5,840 |
| Clonazepam | Generic | 44 | 0 | $621 |
| Amantadine (Amantadine Hcl) | Brand | 41 | 14 | $4,658 |
| Donepezil Hcl | Generic | 33 | 11 | $1,090 |
| Escitalopram Oxalate | Generic | 25 | 0 | $505 |
| Myrbetriq (Mirabegron) | Brand | 23 | 0 | $31,705 |
| Diazepam | Generic | 22 | 0 | $94 |
| Tetrabenazine | Generic | 22 | 0 | $50,576 |
Hospital affiliations
Frequently asked questions
What is Dr. James Maas's medical specialty?
Dr. James Maas practices Neurology Physician in San Francisco, CA.
Where does Dr. James Maas practice?
Dr. James Maas practices at 505 Parnassus Avenue, San Francisco, CA 941430114. Office phone: 4154761489.
What is Dr. James Maas's NPI?
Dr. James Maas's National Provider Identifier (NPI) is 1255506788, issued by NPPES.
Does Dr. James Maas accept Medicare assignment?
Yes. Dr. James Maas accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. James Maas commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (HCPCS G2212); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.