Olayinka Michael Johnson, M.D.
Geriatric Psychiatry Physician · Linthicum, MD
Olayinka Michael Johnson, M.D. is a geriatric psychiatry physician with a practice address in Linthicum, Maryland, and NPI 1093923229, issued on May 20, 2007. Check the license (Maryland D0055180, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Olayinka Michael Johnson
- Credential
- M.D.
- Primary taxonomy
- Geriatric Psychiatry Physician 2084P0805X
- License number
- D0055180 MD
Self-reported in NPPES; status is on the state search - Practice location
- 809 N Hammonds Ferry RD, Linthicum, MD 21090
- Phone
- (410) 789-2500
- Enumerated
- May 20, 2007
- Record last updated
- Nov 21, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (410) 789-2501
- Medicaid ID
- 014146100 MD
- Medicare enrollment
- Enrolled (PECOS I20040715001165); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest geriatric psychiatry physician records → All 24 in Maryland → Look up another NPI →
Also registered at 809 N Hammonds Ferry RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Olayinka Michael Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0055180Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average geriatric psychiatry physician in 2024
363 Medicare Part D claims for 25 beneficiaries, against an average of 1,485 among the 473 providers of this specialty who prescribed in Part D.
Most prescribed
- Quetiapine Fumarate45 claims
- Bupropion Xl40 claims
- Trazodone Hcl39 claims
- Aripiprazole29 claims
- Sertraline Hcl29 claims
- Mirtazapine28 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.
Olayinka Michael Johnson among 24 geriatric psychiatry physician records in Maryland
Olayinka Michael Johnson, M.D. is one of 24 geriatric psychiatry physician records with a practice address in Maryland. 63% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 63% of them.
- NPI issued2007 · 63% of these records are older, 25% newer
- In a Medicare fileYes · 63% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated1988 · median 1988 among the 10 with a school on file
- Record last updated2011 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0805X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 geriatric psychiatry physician record lists a practice address in Linthicum
They are 1 of the 88 NPPES records with a practice address in Linthicum, and 24 geriatric psychiatry physician records in Maryland.
All 24 in Maryland → Every provider in Linthicum → Geriatric Psychiatry Physician nationwide →
The 8 geriatric psychiatry physician records with the nearest ZIP codes
- Glenn Brynes, M.D.Lutherville, MD 210931740293901
- Edward Swanton, M.D.Lutherville, MD 210931407910730
- Mitchell Mathis, M.D.Columbia, MD 210441588846232
- David Loreck, M.D.Baltimore, MD 212011659478071
- Tamela McClam, M.D.Baltimore, MD 212041205095098
- Robert Roca, M.D.Baltimore, MD 212041982785069
- Daniel Beaudry, M.D.Pikesville, MD 212081972513141
- Neil Warres, M.D.Pikesville, MD 212081982789301
Common questions
What is Olayinka Michael Johnson, M.D.'s NPI number?
Olayinka Michael Johnson, M.D.'s National Provider Identifier (NPI) is 1093923229, issued on May 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Olayinka Michael Johnson, M.D. located?
The NPPES record lists a practice address at 809 N Hammonds Ferry RD, Linthicum, MD, 21090. Phone: (410) 789-2500. Providers update this record themselves, so call before visiting.
How can I verify Olayinka Michael Johnson, M.D.'s license?
NPPES lists Maryland license number D0055180, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Olayinka Michael Johnson, M.D. prescribe under Medicare Part D?
In 2024, Olayinka Michael Johnson, M.D. had 363 Medicare Part D claims for 25 beneficiaries; the average among geriatric psychiatry physician prescribers was 1,485. 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.