Doctor profile · Federal record
Dr. Christina Phan, PA
Physician Assistant · Castro Valley, CA
- NPI 1831668987
- Accepts Medicare
- 8 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
20642 John Dr
Castro Valley, CA 945465103
(888) 924-1036 - Additional location
-
1001 S Main St Apt M309
Milpitas, CA 950355367
(408) 712-8859
Credentials & registration
- NPI registered
- November 2018 — 8 yrs on file
- Profile last updated
- August 23, 2021
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 363A00000X — NUCC code
- State license (1)
- California #PA56836
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1831668987. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
539
Distinct HCPCS
4
Medicare allowed
$46,629
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 469 | 420 | $92 | |
81003 |
Automated urinalysis test | 33 | 30 | $2 | |
87428 |
Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza | 19 | 19 | $52 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 18 | 17 | $131 |
In context: peer comparison
Among 8 peers in Castro Valley Physician Assistant, average services per provider: 83. This provider delivers 6.5× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
248
Patients
188
Total drug cost
$3,163
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Paxlovid (Eua) (Nirmatrelvir/Ritonavir) | Brand | 25 | 25 | $241 |
| Azithromycin | Generic | 21 | 18 | $99 |
| Amoxicillin | Generic | 20 | 20 | $66 |
| Doxycycline Hyclate | Generic | 19 | 19 | $210 |
| Fluticasone Propionate | Generic | 19 | 16 | $316 |
| Albuterol Sulfate Hfa (Albuterol Sulfate) | Brand | 18 | 13 | $472 |
| Lagevrio (Eua) (Molnupiravir) | Brand | 18 | 18 | $160 |
| Atorvastatin Calcium | Generic | 15 | 0 | $201 |
| Baclofen | Generic | 14 | 0 | $257 |
| Diclofenac Sodium | Generic | 14 | 11 | $340 |
Hospital affiliations
Frequently asked questions
What is Dr. Christina Phan's medical specialty?
Dr. Christina Phan practices Physician Assistant in Castro Valley, CA.
Where does Dr. Christina Phan practice?
Dr. Christina Phan practices at 20642 John Dr, Castro Valley, CA 945465103. Office phone: 8889241036.
What is Dr. Christina Phan's NPI?
Dr. Christina Phan's National Provider Identifier (NPI) is 1831668987, issued by NPPES.
Does Dr. Christina Phan accept Medicare assignment?
Yes. Dr. Christina Phan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Christina Phan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Automated urinalysis test (HCPCS 81003); Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus and influenza (HCPCS 87428). Source: CMS Medicare Physician & Other Practitioners file.