Mark D. Lowdermilk, MD
Obstetrics & Gynecology Physician · Seattle, WA
Mark D. Lowdermilk, MD is an obstetrics & gynecology physician with a practice address in Seattle, Washington, and NPI 1114001823, issued on Oct 25, 2006. Check the license (Washington MD00034023, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark D. Lowdermilk
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- MD00034023 WA
Self-reported in NPPES; status is on the state search - Practice location
- 1229 Madison St Ste 1450, Seattle, WA 98104
- Phone
- (206) 215-6300
- Enumerated
- Oct 25, 2006
- Record last updated
- Oct 8, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (206) 215-6301
- Medicaid ID
- 8208019 WA
- Medicare enrollment
- Enrolled (PECOS I20090723000678); accepts Medicare assignment
- Medical or professional school
- University Of Utah School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,038 in Washington → Look up another NPI →
Also registered at 1229 Madison St Ste 1450
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cayla AlexanderNurse Practitioner1407480312
- Kristen Austin, MDObstetrics & Gynecology Physician1407927403
- Eleanor Friele, MDObstetrics & Gynecology Physician1396829008
- Carol Horwitt, ARNPObstetrics & Gynecology Nurse Practitioner1588748297
- James Hu, MDDermatology Physician1437277993
- Karen Jones, MDObstetrics & Gynecology Physician1205910916
Verify Mark D. Lowdermilk in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00034023Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
59% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
68 Medicare Part D claims for 31 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Clindamycin Phosphate17 claims
- Estradiol11 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 82.8 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Swedish Health ServicesSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark D. Lowdermilk among 1,038 obstetrics & gynecology physician records in Washington
Mark D. Lowdermilk, MD is one of 1,038 obstetrics & gynecology physician records with a practice address in Washington. 68% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 52% newer
- In a Medicare fileYes · 68% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1994 · median 2007 among the 582 with a school on file
- Record last updated2020 · 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 207V00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Washington
There are 1,038 obstetrics & gynecology physician records in Washington.
All 1,038 in Washington → Every provider in Seattle → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Susan Block, MDSeattle, WA 981041285621771
- Karen Bohmke, MDSeattle, WA 981041003802679
- Ann Bridges, M.D.Seattle, WA 981041811963424
- Robin Cole, MDSeattle, WA 981041043206717
- Sarah Delatorre, MDSeattle, WA 981041104899673
- Philip Dubois, M.D.Seattle, WA 981041578552238
- Nancy Gregory-Hoefling, ARNPSeattle, WA 981041124091517
- Elena Hannon, M.D.Seattle, WA 981041437126067
Common questions
What is Mark D. Lowdermilk, MD's NPI number?
Mark D. Lowdermilk, MD's National Provider Identifier (NPI) is 1114001823, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark D. Lowdermilk, MD located?
The NPPES record lists a practice address at 1229 Madison St Ste 1450, Seattle, WA, 98104. Phone: (206) 215-6300. Providers update this record themselves, so call before visiting.
How can I verify Mark D. Lowdermilk, MD's license?
NPPES lists Washington license number MD00034023, 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 Mark D. Lowdermilk, MD prescribe under Medicare Part D?
In 2024, Mark D. Lowdermilk, MD had 68 Medicare Part D claims for 31 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Mark D. Lowdermilk, MD's MIPS final score?
The 2023 MIPS final score is 82.8 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.