What is Annamalai Veerappan's specialty?

Annamalai Veerappan (NPI 1881628451) is a Medicare-billing provider whose primary specialty is Gastroenterology in Fremont, CA.

Where does Annamalai Veerappan practice?

Annamalai Veerappan practices in Fremont, CA, based on the location reported in the CMS Medicare provider datasets for NPI 1881628451.

How much does Medicare pay Annamalai Veerappan?

Annamalai Veerappan (NPI 1881628451) received approximately $101K in total Medicare Part B payments, serving 449 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1881628451

Annamalai VeerappanM.D.

PRACTICEWASHINGTON MEDICAL GROUPSee all providers at this practice →

GastroenterologyFremont, CAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

697

Unique beneficiaries

—

Total services

796

Distinct HCPCS

Medicare payment

$93K

Peer benchmark

Total Medicare services vs. 1,398 Gastroenterology providers in CA — above median (cohort median 750).

PRESCRIBING · PART D · 2024

Total Rx claims

1,155

Beneficiaries

—

Total drug cost

$459K

Distinct drugs

Brand share

35.1%

Top prescribed drugs

Pantoprazole Sodium425 claims

Sodium Chloride/Nahco3/Kcl/Peg121 claims

Omeprazole111 claims

Sodium, Potassium,mag Sulfates75 claims

Linaclotide62 claims

QUALITY · MIPS · 2024

Final MIPS score

87.7

Quality

66.5

Cost

76.0

Improvement activities

40.0

Promoting interop.

100.0

Payment adjustment

0.54%

Group

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$92

Payment records

By payment type

Food and Beverage$92

Top paying entities

Food and Beverage$92

REFERRAL NETWORK

Where Annamalai Veerappan'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). 41 inbound referrers · 0 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
Mimi Lin Diagnostic Radiology · Fremont, CA	99	391
Jacob Wouden Diagnostic Radiology · Fremont, CA	83	297
Horng Lin Interventional Radiology · Salinas, CA	49	237
Jessie Xiong Pathology · Fremont, CA	35	96
Bala Annadurai Internal Medicine · Fremont, CA	34	250
ENGERS, JOHN	32	179
KOLLURU, GOPALA	31	366
Prasad Katta Endocrinology · Fremont, CA	30	326
Shakir Hyder Gastroenterology · Fremont, CA	28	213
Carl Carlson Cardiology · Fremont, CA	28	81
William Nicholson Cardiology · Fremont, CA	27	90
Royal Ambulance Inc. Ambulance Service Provider · San Leandro, CA	27	128

Refers patients to

Outbound — where patients go next

No outbound pairs above the suppression threshold.

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