Cathlyn Sullivan, DO
Obstetrics & Gynecology Physician · Portland, ME
Cathlyn Sullivan, DO is an obstetrics & gynecology physician with a practice address in Portland, Maine, and NPI 1821525312, issued on May 16, 2017. Check the license (Maine DO3886, as entered in NPPES) on the Maine Board of Licensure in Medicine; the Medicare figures below come from public CMS files.
- Name
- Cathlyn Sullivan
- Credential
- DO
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- DO3886 ME
DOS-2164 HI
Self-reported in NPPES; status is on the state search - Practice location
- 887 Congress St Ste 200, Portland, ME 04102
- Phone
- (207) 771-5549
- Enumerated
- May 16, 2017
- Record last updated
- Apr 1, 2025
- Fax
- (207) 771-7834
- Medicare enrollment
- Enrolled (PECOS I20240808001743); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 205 in Maine → Look up another NPI →
Also registered at 887 Congress St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexandria Betz, DOMaternal & Fetal Medicine Physician1538458377
- Katherine Campbell, MDMaternal & Fetal Medicine Physician1972774784
- Shannon Carr, MDObstetrics & Gynecology Physician1023016789
- Laura Close, DNPFamily Nurse Practitioner1770039059
- Alison Disciullo, MDMaternal & Fetal Medicine Physician1730684259
- Toby Fitzgerald, DOObstetrics & Gynecology Physician1043389745
Verify Cathlyn Sullivan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaine Board of Licensure in Medicine
Search for license DO3886Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3 hospitals and group practices
- Central Maine Medical CenterLewiston, ME · Acute Care Hospitals4 of 5 stars
- Eastern Maine Medical CenterBangor, ME
- MainehealthPortland, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Cathlyn Sullivan among 205 obstetrics & gynecology physician records in Maine
Cathlyn Sullivan, DO is one of 205 obstetrics & gynecology physician records with a practice address in Maine. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 89% of them.
- NPI issued2017 · 89% of these records are older, 6% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2017 · median 2007 among the 119 with a school on file
- Record last updated2025 · 55% 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 Maine 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 Maine
There are 205 obstetrics & gynecology physician records in Maine.
All 205 in Maine → Every provider in Portland → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Julia Brock, M.D.Portland, ME 041021285688937
- Shannon Carr, MDPortland, ME 041021023016789
- Mary Anne Carroll, MDPortland, ME 041021235162116
- Toby Fitzgerald, DOPortland, ME 041021043389745
- Elizabeth Gittinger, MDPortland, ME 041021467445460
- Rebecca Hunt, MDPortland, ME 041021295804896
- Elizabeth Linnell, MDPortland, ME 041021356416739
- Rosa Mojdehi, M.D.C.M.Portland, ME 041021578786802
Common questions
What is Cathlyn Sullivan, DO's NPI number?
Cathlyn Sullivan, DO's National Provider Identifier (NPI) is 1821525312, issued on May 16, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Cathlyn Sullivan, DO located?
The NPPES record lists a practice address at 887 Congress St Ste 200, Portland, ME, 04102. Phone: (207) 771-5549. Providers update this record themselves, so call before visiting.
How can I verify Cathlyn Sullivan, DO's license?
NPPES lists Maine license number DO3886, as entered by the provider. Search the Maine Board of Licensure in Medicine at https://www.maine.gov/md/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.