GIA L HEMMEN MD
NPI 1205858123
Family Medicine in Redmond, WA

Q: What is Gia Hemmen's NPI number?

The NPI number for Gia Hemmen is 1205858123. It was assigned to this individual provider in the NPPES registry on July 24, 2006.

Q: What is Gia Hemmen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Gia Hemmen was last updated on February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since July 24, 2006PECOS EnrolledAccepts Medicare Assignment

18100 NE UNION HILL RD STE 200, REDMOND, WA 98052(206) 320-5190(206) 320-5191 Get Directions Write a Review

NPPES record last updated: February 24, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: May 12, 2020, Dec 10, 2019 (2 updates tracked since 2019).

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About Gia L Hemmen Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GIA L HEMMEN MD (NPI 1205858123) is an individual family medicine provider in Redmond, Washington, licensed in Washington (MD00035217) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Overlake Hospital Medical Center, and is a graduate of University Of Washington School Of Medicine (1995).

NPPES Registry Identity

NPI1205858123

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameGIA L HEMMENCredential: MD

Location Address18100 NE UNION HILL RD STE 200Redmond, WA 98052-3330

Mailing AddressPo Box 25608Salt Lake City, UT 84125-0608 · (206) 320-4476

Phone(206) 320-5190

Fax(206) 320-5191

Sole ProprietorNo

Medical School CMSUniversity Of Washington School Of MedicineGraduated 1995

Enumeration DateJuly 24, 2006

Last NPPES UpdateFebruary 24, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 24, 2026

✔ NPI 1205858123 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in WA · MD00035217

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

Also ListedFamily Medicine · Adult MedicineTaxonomy 207QA0505X · License MD00035217 (WA)

18100 NE UNION HILL RD STE 200, Redmond, WA 98052

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Other Identifiers 1

Medicaid1043248WA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Gia L Hemmen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1951370527

PECOS Enrollment IDI20040930000071

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

218 services105 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

83 services83 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

70 services53 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

17 services14 patients

Hospital Affiliations CMS Care Compare 4

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Overlake Hospital Medical Center

Acute Care Hospitals · Bellevue, WA

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number500051

Location1035-116th Ave NEBellevue, WA 98004 · King County

Emergency services Birthing friendly

Valley Medical Center

Acute Care Hospitals · Renton, WA

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number500088

Location400 S 43rd StRenton, WA 98055 · King County

Emergency services Birthing friendly

Evergreenhealth Medical Center

Acute Care Hospitals · Kirkland, WA

5/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number500124

Location12040 NE 128th StreetKirkland, WA 98034 · King County

Emergency services Birthing friendly

Swedish Issaquah

Acute Care Hospitals · Issaquah, WA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500152

Location751 NE Blakely DrIssaquah, WA 98029 · King County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98052 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.43 typical visit price

range $63.67 – $189.37

Typical copayment $24.35 (range $15.91 – $47.34)

Most-billed visit code 99203

Established Patient

$111.00 typical visit price

range $21.12 – $155.00

Typical copayment $27.75 (range $5.28 – $38.75)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 4

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

12 suppliers36 claims61 services$6.05 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

6 suppliers14 claims14 services$1.13 avg. paid by Medicare

Nebulizer, with compressor E0570

DME-Other DME · category DE000N

2 suppliers11 claims11 services$2.27 avg. paid by Medicare

Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553

DME-Other DME · category DE017N

2 suppliers27 claims27 services$194.95 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

BOWEN HE MD

Internal Medicine