John Feemster
- Part D claims, 2024
- 54
- Hospital affiliations
- 1
- State license
- 1
- Year NPI issued
- 2022
- Practice address
- 600 N Wolfe St, Baltimore, MD 21287
- Practice phone
- Call (855) 662-3017
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Johns Hopkins Hospital Nelson/Harvey Building
Baltimore, Maryland
Find John Feemster's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John Feemster is a sleep medicine (internal medicine) physician in Baltimore, Maryland
John Feemster practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
John Feemster's NPI, 1124766118, was assigned on May 20, 2022. John Feemster holds Minnesota license 82725.
- NPI
- 1124766118NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668850199
- NPI enumeration date
- May 20, 2022
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (855) 662-3017
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
John Feemster practices at Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland
John Feemster's primary practice is Johns Hopkins Hospital Nelson/Harvey Building, at 600 N Wolfe St, Baltimore, MD 21287 in Baltimore City. The practice phone is (855) 662-3017.
- Johns Hopkins Hospital Nelson/Harvey Building600 N Wolfe St, Baltimore, MD 21287 · Baltimore CityPhone(855) 662-3017
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
John Feemster is affiliated with 2 sites of care
John Feemster's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland. John Feemster is also affiliated with The Johns Hopkins Hospital.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John Feemster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Feemster practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Johns Hopkins Hospital Nelson/Harvey Building | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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John Feemster is one of 24 sleep medicine (internal medicine) physicians in Maryland
Internal medicine is John Feemster's primary specialty in the NPI Registry, under taxonomy code 207RS0012X. The record also lists sleep medicine. John Feemster is licensed in Minnesota.
Specialties and state licenses
- Sleep medicine (internal medicine), MinnesotaPrimary
Sleep medicine (internal medicine) physicians near John Feemster
Counts of sleep medicine (internal medicine) physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John Feemster's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts John Feemster's median patient age at 57, with 60% women.
John Feemster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
John Feemster wrote 54 Medicare Part D claims in 2024
In 2024, John Feemster wrote 54 Medicare Part D claims for 22 patients. 96% of them were for generic drugs.
John Feemster's Part D claims by kind of drug, 2024
- Generic52 claims96%
- Brand-name and other2 claims4%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How John Feemster takes part in Medicare
John Feemster accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for John Feemster's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John Feemster
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John Feemster's NPI number?
John Feemster's NPI number is 1124766118. It was assigned on May 20, 2022, and it is active in the NPI Registry.
What does John Feemster specialize in?
John Feemster is a sleep medicine (internal medicine) physician in Baltimore, Maryland. The primary specialty in the NPI Registry is Sleep Medicine (Internal Medicine) Physician (taxonomy code 207RS0012X).
Where does John Feemster practice?
John Feemster practices at 600 N Wolfe St, Baltimore, MD 21287. John Feemster's primary practice is Johns Hopkins Hospital Nelson/Harvey Building in Baltimore, Maryland.
What is John Feemster's office phone number?
The practice phone on file for John Feemster is (855) 662-3017.
What is John Feemster's medical license number?
John Feemster holds Minnesota license 82725.
Which hospitals is John Feemster affiliated with?
John Feemster is affiliated with The Johns Hopkins Hospital.
Does John Feemster accept Medicare?
Yes. CMS lists John Feemster as accepting Medicare assignment.
How long has John Feemster been practicing?
John Feemster's NPI was assigned in 2022.
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