What is William Holderman's specialty?

William Holderman (NPI 1346213956) is a Medicare-billing provider whose primary specialty is Gastroenterology in Tacoma, WA.

Where does William Holderman practice?

William Holderman practices in Tacoma, WA, based on the location reported in the CMS Medicare provider datasets for NPI 1346213956.

How much does Medicare pay William Holderman?

William Holderman (NPI 1346213956) received approximately $64K in total Medicare Part B payments, serving 383 beneficiaries, per the CMS Medicare Physician & Other Practitioners dataset.

PROVIDER PROFILE · NPI 1346213956

William HoldermanM.D.

GastroenterologyTacoma, WAI

MEDICARE UTILIZATION · PART B · 2024

Total beneficiaries

539

Unique beneficiaries

—

Total services

550

Distinct HCPCS

Medicare payment

$57K

Peer benchmark

Total Medicare services vs. 359 Gastroenterology providers in WA — above median (cohort median 511).

PRESCRIBING · PART D · 2024

Total Rx claims

737

Beneficiaries

—

Total drug cost

$909K

Distinct drugs

Brand share

48.6%

Top prescribed drugs

Omeprazole145 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl92 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl72 claims

Pantoprazole Sodium58 claims

Peg3350/Sod Sulf,bicarb,cl/Kcl51 claims

QUALITY · MIPS · 2024

No data available for this provider in 2024.

INDUSTRY PAYMENTS · OPEN PAYMENTS · 2025

Total received

$23K

Payment records

By payment type

Honoraria$14K

Consulting Fee$6K

Food and Beverage$2K

Travel and Lodging$318

Top paying entities

Honoraria$14K

Consulting Fee$6K

Food and Beverage$2K

Travel and Lodging$318

REFERRAL NETWORK

Where William Holderman'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). 10 inbound referrers · 13 outbound destinations.

Receives referrals from

Inbound — who sends patients here

Physician	Patients	Visits
MULTICARE HEALTH SYSTEM	122	308
Angela Fields Pathology · Tacoma, WA	113	124
Mark Watson Certified Registered Nurse Anesthetist (CRNA) · Tacoma, WA	55	55
Ryan Mcdonald Certified Registered Nurse Anesthetist (CRNA) · Tacoma, WA	33	35
WHALEY, CHRISTOPHER	27	27
Michelle Hendrickx Nurse Practitioner · Tacoma, WA	14	29
BESS, SANDRA	12	12
Bradley Schmitz Internal Medicine · Tacoma, WA	12	25
WHITE, BETTY	11	140
SHARP, MELISSA	11	19

Refers patients to

Outbound — where patients go next

Physician	Patients	Visits
Western Washington Endoscopy Centers Llc Ambulatory Surgical Center · Tacoma, WA	286	355
MULTICARE HEALTH SYSTEM	120	273
RICHARDSON, MARGARET	79	101
Bruce Mcpeters Certified Registered Nurse Anesthetist (CRNA) · Tacoma, WA	70	77
Tama Hollar Certified Registered Nurse Anesthetist (CRNA) · Tacoma, WA	34	42
FRANCISCAN HEALTH SYSTEM	26	70
KELLEY, JAMES	23	23
Paul Gregor Certified Registered Nurse Anesthetist (CRNA) · Tacoma, WA	22	23
WHITE, BETTY	15	129
Angela Fields Pathology · Tacoma, WA	14	21
Bradley Schmitz Internal Medicine · Tacoma, WA	12	21
MULTICARE HEALTH SYSTEM	11	14

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