Gia Hemmen, MD
NPI 1205858123 · Family Medicine Physician · Redmond, WA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gia Hemmen, MD is a Family Medicine Physician provider in Redmond, WA (NPI 1205858123).
Provider details
- NPI number
- 1205858123
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD00035217 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
521 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 218 | $100 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 133 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 83 | $141 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 70 | $70 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 17 | $158 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 127 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 528 | 138 |
| Amlodipine Besylate | 383 | 103 |
| Levothyroxine Sodium | 348 | 76 |
| Losartan Potassium | 315 | 83 |
| Gabapentin | 252 | 51 |
| Lisinopril | 234 | 61 |
| Furosemide | 213 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-24
- Last updated
- 2026-02-24
- Certified
- 2026-02-24
Frequently asked questions
- What is Gia Hemmen's NPI number?
- Gia Hemmen's National Provider Identifier (NPI) is 1205858123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gia Hemmen's specialty?
- Gia Hemmen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gia Hemmen located?
- Gia Hemmen's practice location on file with NPPES is 18100 Ne Union Hill Rd Ste 200, Redmond, WA 98052-3330.
- What is Gia Hemmen's phone number?
- The practice phone number listed in the NPPES registry for Gia Hemmen is (206) 320-5190.
- Does Gia Hemmen accept Medicare?
- Gia Hemmen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gia Hemmen's NPI active?
- Yes — Gia Hemmen's NPI (1205858123) is active in the NPPES registry as of the last update on 2026-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.