Gia L. Hemmen, MD
Family Medicine Physician · Redmond, WA
Gia L. Hemmen, MD is a family medicine physician with a practice address in Redmond, Washington, and NPI 1205858123, issued on Jul 24, 2006. Check the license (Washington MD00035217, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Gia L. Hemmen
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD00035217 WA
Self-reported in NPPES; status is on the state search - Practice location
- 18100 NE Union Hill RD Ste 200, Redmond, WA 98052
- Phone
- (206) 320-5190
- Enumerated
- Jul 24, 2006
- Record last updated
- Feb 24, 2026
- Fax
- (206) 320-5191
- Medicaid ID
- 1043248 WA
- Medicare enrollment
- Enrolled (PECOS I20040930000071); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 1995
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 18100 NE Union Hill RD Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gia L. Hemmen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00035217Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average family medicine physician in 2024
7,549 Medicare Part D claims for 448 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 115 claims were for opioids.
Most prescribed
- Atorvastatin Calcium528 claims
- Amlodipine Besylate383 claims
- Levothyroxine Sodium348 claims
- Losartan Potassium315 claims
- Gabapentin252 claims
- Lisinopril234 claims
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.
Bills Medicare through 2 group practices
- Swedish Health ServicesRedmond, WA
- Valley Medical Group-RentonCovington, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gia L. Hemmen among 5,534 family medicine physician records in Washington
Gia L. Hemmen, MD is one of 5,534 family medicine physician records with a practice address in Washington. 73% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1995 · median 2009 among the 3,294 with a school on file
- Record last updated2026 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
76 family medicine physician records list a practice address in Redmond
They are 76 of the 1,797 NPPES records with a practice address in Redmond, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Redmond → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Gregory Aeschliman, MDRedmond, WA 980521770565756
- Robert Bayles, MDRedmond, WA 980521235111220
- Jeffrey BrownRedmond, WA 980521912907783
- Philip Chan, MDRedmond, WA 980521942231899
- Jenny Chen, MDRedmond, WA 980521427041102
- James Ho, MDRedmond, WA 980521497787196
- Pen Hou, M.D.Redmond, WA 980521114960937
- Mindy Hsue, M.D.Redmond, WA 980521760415251
Common questions
What is Gia L. Hemmen, MD's NPI number?
Gia L. Hemmen, MD's National Provider Identifier (NPI) is 1205858123, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gia L. Hemmen, MD located?
The NPPES record lists a practice address at 18100 NE Union Hill RD Ste 200, Redmond, WA, 98052. Phone: (206) 320-5190. Providers update this record themselves, so call before visiting.
How can I verify Gia L. Hemmen, MD's license?
NPPES lists Washington license number MD00035217, 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 Gia L. Hemmen, MD prescribe under Medicare Part D?
In 2024, Gia L. Hemmen, MD had 7,549 Medicare Part D claims for 448 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.