Nathan D. Parker, DO
Obstetrics & Gynecology Physician · Portland, OR
Nathan D. Parker, DO is an obstetrics & gynecology physician with a practice address in Portland, Oregon, and NPI 1578957791, issued on Mar 25, 2015. Check the license (Oregon DO203701, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nathan D. Parker
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- DO203701 OR
Self-reported in NPPES; status is on the state search - Practice location
- 5050 NE Hoyt St Ste 210, Portland, OR 97213
- Phone
- (503) 249-5454
- Enumerated
- Mar 25, 2015
- Record last updated
- Jan 30, 2026
- Fax
- (503) 249-5498
- Medicaid ID
- 500798976 OR
- Medicare enrollment
- Enrolled (PECOS I20210804002307); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 654 in Oregon → Look up another NPI →
Also registered at 5050 NE Hoyt St Ste 210
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Barbara Coiner, LPCProfessional Counselor1437506573
- John Gunselman, D.O.Urology Physician1194953125
- Lisa Johnson, MDObstetrics & Gynecology Physician1942296579
- Mia Kane, CNMAdvanced Practice Midwife1780392944
- Jaime Kean, MDObstetrics & Gynecology Physician1457346371
Verify Nathan D. Parker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO203701Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
93 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 24% of claims.
Most prescribed
- Estradiol24 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 one group practice
- Womens Healthcare Associates LLCPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan D. Parker among 654 obstetrics & gynecology physician records in Oregon
Nathan D. Parker, DO is one of 654 obstetrics & gynecology physician records with a practice address in Oregon. 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 2015, is newer than 83% of them.
- NPI issued2015 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2007 among the 413 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 207V00000X and a Oregon 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 Oregon
There are 654 obstetrics & gynecology physician records in Oregon.
All 654 in Oregon → Every provider in Portland → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Stephanie Ahmed, MDPortland, OR 972131447269170
- Ross Anderson, MDPortland, OR 972131447209549
- Desiree Bley, MDPortland, OR 972131174626493
- Renee Carisio Farber, MDPortland, OR 972131700855517
- Brendan Carroll, MDPortland, OR 972131669472775
- Amanda Clark, MDPortland, OR 972131689682205
- Jennifer Franz, MDPortland, OR 972131215915806
- Janet Gibbens, M.D.Portland, OR 972131427042373
Common questions
What is Nathan D. Parker, DO's NPI number?
Nathan D. Parker, DO's National Provider Identifier (NPI) is 1578957791, issued on Mar 25, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Nathan D. Parker, DO located?
The NPPES record lists a practice address at 5050 NE Hoyt St Ste 210, Portland, OR, 97213. Phone: (503) 249-5454. Providers update this record themselves, so call before visiting.
How can I verify Nathan D. Parker, DO's license?
NPPES lists Oregon license number DO203701, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathan D. Parker, DO prescribe under Medicare Part D?
In 2024, Nathan D. Parker, DO had 93 Medicare Part D claims for 31 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.