Ryan Christopher Mast, D.O.
Psychiatry Physician · Dayton, OH
Ryan Christopher Mast, D.O. is a psychiatry physician with a practice address in Dayton, Ohio, and NPI 1376714675, issued on Mar 14, 2008. Check the license (Ohio 154535, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Ryan Christopher Mast
- Credential
- D.O.
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 154535 OH
Self-reported in NPPES; status is on the state search - Practice location
- 627 South Edwin C. Moses Blvd, Dayton, OH 45408
- Phone
- (937) 223-8840
- Enumerated
- Mar 14, 2008
- Record last updated
- Aug 5, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (937) 223-0758
- Medicare enrollment
- Enrolled (PECOS I20120913000793); accepts Medicare assignment
- Medical or professional school
- Ohio University, College Of Osteopathic Medicine, 2007
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 1,587 in Ohio → Look up another NPI →
Verify Ryan Christopher Mast in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 154535Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average psychiatry physician in 2024
20 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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
- Mahajan Therapeutics, LLCDayton, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Christopher Mast among 1,587 psychiatry physician records in Ohio
Ryan Christopher Mast, D.O. is one of 1,587 psychiatry physician records with a practice address in Ohio. 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 2008, is newer than 61% of them.
- NPI issued2008 · 61% of these records are older, 35% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 49% of these records are
- Graduated2007 · median 2003 among the 775 with a school on file
- Record last updated2010 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Ohio
There are 1,587 psychiatry physician records in Ohio.
All 1,587 in Ohio → Every provider in Dayton → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Stephanie Ackner, M.D.Dayton, OH 454081285734566
- Meicheng ChiangDayton, OH 454081144428624
- Jacqueline Countryman, MDDayton, OH 454081396802096
- Brien Dyer, MDDayton, OH 454081477610939
- Julie Gentile, MDDayton, OH 454081801853726
- Michael Ignatowski, D.O.Dayton, OH 454081689872962
- Mary Kuruvilla, MDDayton, OH 454081497973143
- Jaseem Pasha, M.D.Dayton, OH 454081104943133
Common questions
What is Ryan Christopher Mast, D.O.'s NPI number?
Ryan Christopher Mast, D.O.'s National Provider Identifier (NPI) is 1376714675, issued on Mar 14, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Christopher Mast, D.O. located?
The NPPES record lists a practice address at 627 South Edwin C. Moses Blvd, Dayton, OH, 45408. Phone: (937) 223-8840. Providers update this record themselves, so call before visiting.
How can I verify Ryan Christopher Mast, D.O.'s license?
NPPES lists Ohio license number 154535, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ryan Christopher Mast, D.O. prescribe under Medicare Part D?
In 2024, Ryan Christopher Mast, D.O. had 20 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. 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.