Robert M. Gannan, MD PHD
Gastroenterology Physician · Bellevue, WA
Robert M. Gannan, MD PHD is a gastroenterology physician with a practice address in Bellevue, Washington, and NPI 1811976533, issued on Jan 11, 2006. Check the license (Washington 16481, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Robert M. Gannan
- Credential
- MD PHD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 16481 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1135 116TH Ave NE, Bellevue, WA 98004
- Phone
- (425) 454-4768
- Enumerated
- Jan 11, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (425) 462-8021
- Medicaid ID
- 1165208 WA
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 533 in Washington → Look up another NPI →
Also registered at 1135 116TH Ave NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert M. Gannan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license 16481Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average gastroenterology physician in 2024
41 Medicare Part D claims, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Robert M. Gannan among 533 gastroenterology physician records in Washington
Robert M. Gannan, MD PHD is one of 533 gastroenterology physician records with a practice address in Washington. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 48% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 70% of these records are
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Washington
There are 533 gastroenterology physician records in Washington.
All 533 in Washington → Every provider in Bellevue → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Gaurav Aggarwal, M.D.Bellevue, WA 980041902083587
- Raj Butani, M.D.Bellevue, WA 980041285695221
- Raymond Hsia, M.D.Bellevue, WA 980041528117702
- Kalle Kang, M.D.Bellevue, WA 980041780626630
- Sang Kim, M.D.Bellevue, WA 980041225070170
- Edwin Lai, M.D.Bellevue, WA 980041891824777
- Venkatachala Mohan, MDBellevue, WA 980041194704106
- Pallavi PatelBellevue, WA 980041598818940
Common questions
What is Robert M. Gannan, MD PHD's NPI number?
Robert M. Gannan, MD PHD's National Provider Identifier (NPI) is 1811976533, issued on Jan 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert M. Gannan, MD PHD located?
The NPPES record lists a practice address at 1135 116TH Ave NE, Bellevue, WA, 98004. Phone: (425) 454-4768. Providers update this record themselves, so call before visiting.
How can I verify Robert M. Gannan, MD PHD's license?
NPPES lists Washington license number 16481, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert M. Gannan, MD PHD prescribe under Medicare Part D?
In 2024, Robert M. Gannan, MD PHD had 41 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.