What is Tammy Wan's specialty?

Tammy Wan (NPI 1205137981) is a Medicare-billing provider whose primary specialty is Internal Medicine in Los Angeles, CA.

Where does Tammy Wan practice?

Tammy Wan practices in Los Angeles, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1205137981.

How much does Medicare pay Tammy Wan?

Tammy Wan (NPI 1205137981) received approximately $10K in total Medicare Part B payments, serving 34 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1205137981

Tammy WanM.D.

Internal MedicineLos Angeles, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

Unique beneficiaries

—

Total services

Distinct HCPCS

Medicare payment

$8K

Peer benchmark

Total Medicare services vs. 10,499 Internal Medicine providers in CA — bottom quintile (cohort median 531).

PRESCRIBING · PART D · 2024

Total Rx claims

1,451

Beneficiaries

—

Total drug cost

$97K

Distinct drugs

Brand share

9.9%

Top prescribed drugs

Calcitriol186 claims

Amlodipine Besylate153 claims

Furosemide144 claims

Losartan Potassium105 claims

Sevelamer Carbonate86 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

No data available for this provider in 2025.

FACILITY AFFILIATIONS

Hospital & Facility Affiliations (2)

CCN 552532

Dialysis facility

CCN 050411

Hospital

REFERRAL NETWORK

Where Tammy Wan's patients come from & go

Directional shared-patient flow from Medicare claims — who sends patients to this provider (inbound) and where this provider's patients go next (outbound). 0 inbound referrers · 3 outbound destinations.

Receives referrals from

Inbound — who sends patients here

No inbound pairs above the suppression threshold.

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
REGENTS UNIV OF CALIF LOS ANGELES	42	225
Minhtri Nguyen Nephrology · Los Angeles, CA	31	111
Carl Schulze Nephrology · Burbank, CA	14	23

Source: CMS Physician Shared Patient Patterns (30-day window, Medicare FFS). Direction = a beneficiary seen by the first provider, then the second, within 30 days; a proxy for referral, not a documented referral. Pairs with fewer than 11 shared beneficiaries are suppressed.

CROSS-REFERENCE

Related data on other Healthparse brands

ProviderScore

OIG/SAM exclusion screening, sanctions history

Healthparse Signals

Monitor this provider for changes — dated NPI change events