Doctor profile · Federal record
Dr. Ann Williamson, APRN
Nurse Practitioner · Los Angeles, CA
- NPI 1801316765
- Accepts Medicare
- MIPS 84.8 / 100 · 2023
- 8 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
757 Westwood Plz
Los Angeles, CA 900958358
(310) 562-4713
Credentials & registration
- NPI registered
- June 2017 — 9 yrs on file
- Profile last updated
- February 20, 2026
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 363L00000X — NUCC code
- State license (1)
- California #21769
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1801316765. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
38
Distinct HCPCS
2
Medicare allowed
$3,186
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 24 | 17 | $71 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 14 | 12 | $106 |
In context: peer comparison
Among 42 peers in Los Angeles Nurse Practitioner, average services per provider: 508. This provider delivers 0.1× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Ann Williamson's medical specialty?
Dr. Ann Williamson practices Nurse Practitioner in Los Angeles, CA.
Where does Dr. Ann Williamson practice?
Dr. Ann Williamson practices at 757 Westwood Plz, Los Angeles, CA 900958358. Office phone: 3105624713.
What is Dr. Ann Williamson's NPI?
Dr. Ann Williamson's National Provider Identifier (NPI) is 1801316765, issued by NPPES.
Does Dr. Ann Williamson accept Medicare assignment?
Yes. Dr. Ann Williamson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ann Williamson commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233). Source: CMS Medicare Physician & Other Practitioners file.