Chad R. Sumulong, DO
Family Medicine Physician · Seattle, WA
Chad R. Sumulong, DO is a family medicine physician with a practice address in Seattle, Washington, and NPI 1679152888, issued on Apr 5, 2021. Check the license (Washington OP61167160, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Chad R. Sumulong
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- OP61167160 WA
Self-reported in NPPES; status is on the state search - Practice location
- 3400 California Ave SW, Seattle, WA 98116
- Phone
- (206) 933-1041
- Enumerated
- Apr 5, 2021
- Record last updated
- Jul 8, 2025
- Fax
- (206) 933-1047
- Medicaid ID
- 2183439 WA
- Medicare enrollment
- Enrolled (PECOS I20241014001217); accepts Medicare assignment
- Medical or professional school
- Pacific Nw Un Of Hs, Col Of Osteopathic Medicine, 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 3400 California Ave SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stephanie Feifs, FNP, ARNPFamily Nurse Practitioner1386662245
- Stephanie Greene, MS, PTPhysical Therapist1811148299
Verify Chad R. Sumulong in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license OP61167160Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% fewer Medicare Part D claims than the average family medicine physician in 2024
542 Medicare Part D claims for 143 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Atorvastatin Calcium36 claims
- Lisinopril33 claims
- Amlodipine Besylate25 claims
- Gabapentin24 claims
- Ozempic22 claims
- Propranolol Hcl16 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
- Franciscan Medical GroupSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chad R. Sumulong among 5,534 family medicine physician records in Washington
Chad R. Sumulong, DO is one of 5,534 family medicine physician records with a practice address in Washington. 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 2021, is newer than 91% of them.
- NPI issued2021 · 91% of these records are older, 6% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2021 · median 2009 among the 3,294 with a school on file
- Record last updated2025 · 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 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
871 family medicine physician records list a practice address in Seattle
They are 871 of the 41,956 NPPES records with a practice address in Seattle, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Seattle → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jeffery Brittin, MDSeattle, WA 981161831121797
- Monika Cox, MDSeattle, WA 981161881806578
- Thomas Frazer, MDSeattle, WA 981161457461188
- Karen Kaser, MDSeattle, WA 981161124060819
- Rachel Kopicki, M.D.Seattle, WA 981161184078594
- Michael Kovar, MDSeattle, WA 981161740352228
- Xin Luo, MDSeattle, WA 981161003106675
- Dobrina Okorn, MDSeattle, WA 981161316022650
Common questions
What is Chad R. Sumulong, DO's NPI number?
Chad R. Sumulong, DO's National Provider Identifier (NPI) is 1679152888, issued on Apr 5, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Chad R. Sumulong, DO located?
The NPPES record lists a practice address at 3400 California Ave SW, Seattle, WA, 98116. Phone: (206) 933-1041. Providers update this record themselves, so call before visiting.
How can I verify Chad R. Sumulong, DO's license?
NPPES lists Washington license number OP61167160, 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 Chad R. Sumulong, DO prescribe under Medicare Part D?
In 2024, Chad R. Sumulong, DO had 542 Medicare Part D claims for 143 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.