What is Vivian Lam's NPI number?

Vivian Lam's National Provider Identifier (NPI) is 1952926073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Vivian Lam's specialty?

Vivian Lam is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Vivian Lam located?

Vivian Lam's practice location on file with NPPES is 3650 Joseph Siewick Dr Ste 400, Fairfax, VA 22033-1715.

What is Vivian Lam's phone number?

The practice phone number listed in the NPPES registry for Vivian Lam is (703) 391-2020.

Does Vivian Lam accept Medicare?

Vivian Lam is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Vivian Lam's NPI active?

Yes — Vivian Lam's NPI (1952926073) is active in the NPPES registry as of the last update on 2025-03-03.

IndividualActiveAccepts Medicare

Vivian Lam, MD

NPI 1952926073 · Family Medicine Physician · Fairfax, VA

Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Vivian Lam, MD is a Family Medicine Physician provider in Fairfax, VA (NPI 1952926073).

Provider details

NPI number: 1952926073
Entity type: Individual
Primary specialty: Family Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Female
Sole proprietor: Yes

Specialties & taxonomies

Family Medicine PhysicianPrimary207Q00000XLicense MD482818 (PA)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Profile Score

Established profile(50/100 index)

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
83% of core fields populated
Practice footprint17% of score
37 documented practice locations
Medicare service volume (vs. specialty peers)28% of score
162 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214	103	$121
Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213	59	$85

Typical Medicare-allowed amounts for these services range $85–$121 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 23 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Fluticasone Propionate	66	42
Pantoprazole Sodium	39	29
Famotidine	34	17
Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass	25	25
Levocetirizine Dihydrochloride	25	11
Omeprazole	24	—
Sertraline Hcl	24

Practice location

3650 Joseph Siewick Dr Ste 400

Fairfax, VA 22033-1715

Phone: (703) 391-2020

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Mailing address