Dr. John C. Baker, DO
- Medicare services, 2024
- 528
- Medicare patients, 2024
- 118
- Part D claims, 2024
- 3,714
- Hospital affiliations
- 3
- Industry payments
- $608
- Practice address
- 667 Eastland Ave SE, Warren, OH 44484
- Practice phone
- Call (330) 841-4016
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Baker'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.
Dr. John C. Baker is a family medicine physician in Warren, Ohio
Dr. Baker practices at Mercy Health - St. Joseph Warren Hospital in Warren, Ohio, part of Bon Secours Mercy Health.
Dr. Baker's NPI, 1205987666, was assigned on January 14, 2007. Dr. Baker graduated from Philadelphia College of Osteopathic Medicine in 1979. Dr. Baker holds Ohio license 34-003006.
- NPI
- 1205987666NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820255706
- NPI enumeration date
- January 14, 2007
- NPI status
- Active
- Practice phone
- (330) 841-4016
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John C. Baker practices at Mercy Health - St. Joseph Warren Hospital in Warren, Ohio
Dr. Baker's primary practice is Mercy Health - St. Joseph Warren Hospital, at 667 Eastland Ave SE, Warren, OH 44484 in Trumbull County. The practice phone is (330) 841-4016.
- Mercy Health - St. Joseph Warren Hospital667 Eastland Ave SE, Warren, OH 44484 · Trumbull CountyPhone(330) 841-4016
Source: Dmand AI Affiliation Data
Dr. John C. Baker is affiliated with 4 sites of care
Dr. Baker's primary practice is Mercy Health - St. Joseph Warren Hospital in Warren, Ohio, part of Bon Secours Mercy Health. Dr. Baker is also affiliated with Mercy Health - St. Elizabeth Youngstown Hospital. Dmand AI also links Dr. Baker to 1 more hospital and 1 hospital outpatient department, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John C. Baker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Baker practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Health - St. Joseph Warren Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Bon Secours Mercy Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John C. Baker is one of 4,955 family medicine physicians in Ohio
Family medicine is Dr. Baker's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Baker is licensed in Ohio.
Specialties and state licenses
- Family medicine, OhioPrimary
Family medicine physicians near Dr. Baker
Counts of family 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
Dr. John C. Baker billed Medicare for 528 services in 2024
CMS data shows 528 Medicare services from Dr. Baker across 2 procedure codes in 2024, all of them office visits, for 118 Medicare patients. Medicare paid $25,211 for them. Every service was in an office.
Dr. Baker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5062024: 5284%
Dr. Baker compared with the Ohio median for family medicine physicians, 2024
- Dr. Baker
- Ohio median
- Medicare services
- 528vs 40132% above
- Medicare patients
- 118vs 15122% below
- Part D claims
- 3,213vs 1,3232.4 times
Medians across 5,096 family medicine physicians in Ohio with Dmand AI profiles that report each measure.
Dr. Baker's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Baker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Baker and other family medicine physicians in Ohio.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Baker treated 118 Medicare patients in 2024, average age 75
CMS counts 118 Medicare patients who saw Dr. Baker in 2024. The largest group is 65 to 74, with 59 patients. 75% of them have high blood pressure, and 65% have high cholesterol. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Baker's median patient age at 71, with 46% women.
Dr. Baker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Baker's Medicare patients by sex, 2024
- Women6555%
- Men5345%
Chronic conditions among Dr. Baker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol65%
- Arthritis53%
- Diabetes32%
- Ischemic heart disease25%
- COPD19%
- Mood disorders19%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Baker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John C. Baker wrote 3,714 Medicare Part D claims in 2024
In 2024, Dr. Baker wrote 3,714 Medicare Part D claims for 196 patients. 89% of them were for generic drugs. CMS names the drug for 3,213 of them, across 82 drugs with 11 or more claims each, at $196,427 in total drug cost. In 2023, CMS named 3,023 claims across 76 drugs.
Dr. Baker's Part D claims by kind of drug, 2024
- Generic3,292 claims89%
- Brand-name393 claims11%
- Other29 claims1%
Dr. Baker's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Baker's Part D claims, 2024
- Opioids3%98 of 3,714 claims
- Antibiotics5%170 of 3,714 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0232024: 3,2136%
Drugs named by CMS: 82 in 2024, 76 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John C. Baker received $608 in industry payments from 2016 to 2021
CMS Open Payments shows 11 general payments to Dr. Baker from 7 drug and device companies from 2016 to 2021. Food and beverage make up the largest share, 100% of the total. Amarin Pharma Inc. paid the most, $200.
General payments to Dr. Baker by program year, 2016 to 2021
Companies that paid Dr. Baker the most, 2016 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John C. Baker graduated from Philadelphia College of Osteopathic Medicine
Dr. Baker graduated from Philadelphia College of Osteopathic Medicine in 1979.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John C. Baker'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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 Dr. John C. Baker
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John C. Baker's NPI number?
Dr. John C. Baker's NPI number is 1205987666. It was assigned on January 14, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Baker?
Dr. John C. Baker is a family medicine physician in Warren, Ohio. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. John C. Baker practice?
Dr. Baker practices at 667 Eastland Ave SE, Warren, OH 44484. Dr. Baker's primary practice is Mercy Health - St. Joseph Warren Hospital in Warren, Ohio, part of Bon Secours Mercy Health. Dmand AI also links Dr. Baker to 1 hospital and 1 hospital outpatient department.
What is Dr. John C. Baker's office phone number?
The practice phone on file for Dr. Baker is (330) 841-4016.
What is Dr. John C. Baker's medical license number?
Dr. Baker holds Ohio license 34-003006.
Which hospitals is Dr. John C. Baker affiliated with?
Dr. Baker practices at Mercy Health - St. Joseph Warren Hospital in Warren, Ohio. Dr. Baker is also affiliated with Mercy Health - St. Elizabeth Youngstown Hospital. Dmand AI links Dr. Baker to 1 more hospital.
Does Dr. John C. Baker accept Medicare?
Yes. CMS data shows Dr. Baker billed Medicare for 528 services in 2024.
How many Medicare patients does Dr. John C. Baker see?
CMS counts 118 Medicare patients who saw Dr. Baker in 2024, with an average age of 75.
What services does Dr. John C. Baker bill to Medicare?
In 2024, Dr. Baker's most billed Medicare services were office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. John C. Baker go to medical school?
Dr. Baker graduated from Philadelphia College of Osteopathic Medicine in 1979.
Show 3 more questionsShow fewer questions
What drugs does Dr. John C. Baker prescribe most?
In 2024 Medicare Part D data, Dr. Baker's most prescribed drugs by claims were Lisinopril, Amlodipine Besylate and Atorvastatin Calcium.
Has Dr. John C. Baker received payments from drug or device companies?
CMS Open Payments shows $608 in general payments to Dr. Baker from 7 companies from 2016 to 2021. The largest total came from Amarin Pharma Inc.
How long has Dr. John C. Baker been practicing?
Dr. Baker graduated from medical school in 1979, 47 years ago.
Selling to family medicine practices?
See family medicine physicians in Ohio by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card