Mary Isabelle Colene Huynh
NPI 1386278547 · Physician Assistant · Mountain View, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Isabelle Colene Huynh is a Physician Assistant provider in Mountain View, CA (NPI 1386278547).
Provider details
- NPI number
- 1386278547
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 57652 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
6 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
264 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 110 | $93 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 52 | $114 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 42 | $131 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 42 | $134 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 18 | $161 |
Typical Medicare-allowed amounts for these services range $93–$161 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alendronate Sodium | 15 | — |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 14 | 14 |
| Azithromycin | 13 | 13 |
| Atorvastatin Calcium | 12 | — |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 12 | — |
| Doxycycline Monohydrate | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-02-26
- Last updated
- 2021-08-17
- Certified
- 2021-08-17
Frequently asked questions
- What is Mary Isabelle Colene Huynh's NPI number?
- Mary Isabelle Colene Huynh's National Provider Identifier (NPI) is 1386278547, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Isabelle Colene Huynh's specialty?
- Mary Isabelle Colene Huynh is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary Isabelle Colene Huynh located?
- Mary Isabelle Colene Huynh's practice location on file with NPPES is 701 E El Camino Real, Mountain View, CA 94040-2833.
- What is Mary Isabelle Colene Huynh's phone number?
- The practice phone number listed in the NPPES registry for Mary Isabelle Colene Huynh is (650) 934-7808.
- Does Mary Isabelle Colene Huynh accept Medicare?
- Mary Isabelle Colene Huynh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Isabelle Colene Huynh's NPI active?
- Yes — Mary Isabelle Colene Huynh's NPI (1386278547) is active in the NPPES registry as of the last update on 2021-08-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.