Dr. John T. Walker, DO
- Medicare services, 2024
- 344
- Medicare patients, 2024
- 242
- Part D claims, 2024
- 948
- MIPS score, 2024
- 98
- Hospital affiliations
- 1
- Practice address
- 1 Medical Center Dr, Biddeford, ME 04005
- Practice phone
- Call (207) 283-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Smhc Medical Center
Biddeford, Maine
Find Dr. Walker'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 T. Walker is an internist in Biddeford, Maine
Dr. Walker practices at Smhc Medical Center in Biddeford, Maine.
Dr. Walker's NPI, 1851737811, was assigned on May 17, 2013. Dr. Walker holds Maine license DO2640.
- NPI
- 1851737811NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426290701
- NPI enumeration date
- May 17, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 283-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John T. Walker practices at Smhc Medical Center in Biddeford, Maine
Dr. Walker's primary practice is Smhc Medical Center, at 1 Medical Center Dr, Biddeford, ME 04005 in York County. The practice phone is (207) 283-7000.
- Smhc Medical Center1 Medical Center Dr, Biddeford, ME 04005 · York CountyPhone(207) 283-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John T. Walker is affiliated with 2 sites of care and 1 medical group
Dr. Walker's primary practice is Smhc Medical Center in Biddeford, Maine. Dr. Walker is also affiliated with MaineHealth Maine Medical Center. The medical group on file is MaineHealth Primary Care - Family Medicine - Portland.
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 Dr. John T. Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Smhc Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John T. Walker is one of 572 internists in Maine
Internal medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Walker is licensed in Maine.
Specialties and state licenses
- Internal medicine, MainePrimary
Internists near Dr. Walker
Counts of internists 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 T. Walker billed Medicare for 344 services in 2024
CMS data shows 344 Medicare services from Dr. Walker across 8 procedure codes in 2024, for 242 Medicare patients. Medicare paid $28,830 for them.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2082024: 23111%
- Office and hospital visits
- 2023: 662024: 652%
- Other services
- 2023: 02024: 48
Where Dr. Walker's Medicare services took place, 2024
- In an office9528%
- In a facility24972%
Dr. Walker compared with the Maine median for internists, 2024
- Dr. Walker
- Maine median
- Medicare services
- 344vs 31410% above
- Medicare patients
- 242vs 15457% above
- Part D claims
- 782vs 2113.7 times
Medians across 600 internists in Maine with Dmand AI profiles that report each measure.
Dr. Walker'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John T. Walker treated 242 Medicare patients in 2024, average age 71
CMS counts 242 Medicare patients who saw Dr. Walker in 2024. The largest group is 65 to 74, with 112 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 30% are also on Medicaid. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 63, with 55% women.
Dr. Walker's Medicare patients by age, 2024
Dr. Walker's Medicare patients by sex, 2024
- Women14259%
- Men10041%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis47%
- Anxiety38%
- Mood disorders33%
- Diabetes32%
- Chronic kidney disease28%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John T. Walker wrote 948 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 948 Medicare Part D claims for 482 patients. 82% of them were for generic drugs. CMS names the drug for 782 of them, across 15 drugs with 11 or more claims each, at $94,633 in total drug cost. In 2023, CMS named 606 claims across 12 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic779 claims82%
- Brand-name169 claims18%
Dr. Walker'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. Walker's Part D claims, 2024
- Antibiotics2%20 of 948 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: 6062024: 78229%
Drugs named by CMS: 15 in 2024, 12 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
Dr. John T. Walker scored 98 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 98 out of 100 for Dr. Walker for performance year 2024, reported through an alternative payment model (APM). Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 93 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Walker, more than 75% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Walker's MIPS scores, performance year 2024
- 98of 100Final score
- 83.3of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Walker ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 75th percentile93 procedures
- Colonoscopy
- 72nd percentile74 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. John T. Walker received $187 in industry payments from 2017 to 2019
CMS Open Payments shows 6 general payments to Dr. Walker from 4 drug and device companies from 2017 to 2019. Food and beverage make up the largest share, 65% of the total. Covidien LP paid the most, $134.
General payments to Dr. Walker by program year, 2017 to 2019
General payments to Dr. Walker by kind, 2017 to 2019
- Food and beverage$12265%
- Education$6535%
Companies that paid Dr. Walker the most, 2017 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John T. Walker's profile data
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John T. Walker
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 T. Walker's NPI number?
Dr. John T. Walker's NPI number is 1851737811. It was assigned on May 17, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. John T. Walker?
Dr. John T. Walker is an internist in Biddeford, Maine. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John T. Walker practice?
Dr. Walker practices at 1 Medical Center Dr, Biddeford, ME 04005. Dr. Walker's primary practice is Smhc Medical Center in Biddeford, Maine.
What is Dr. John T. Walker's office phone number?
The practice phone on file for Dr. Walker is (207) 283-7000.
What is Dr. John T. Walker's medical license number?
Dr. Walker holds Maine license DO2640.
Which hospitals is Dr. John T. Walker affiliated with?
Dr. Walker is affiliated with MaineHealth Maine Medical Center.
What medical group is Dr. John T. Walker part of?
Dr. Walker is linked to MaineHealth Primary Care - Family Medicine - Portland.
Does Dr. John T. Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 344 services in 2024, and Dr. Walker accepts Medicare assignment.
What is Dr. John T. Walker's MIPS score?
Dr. Walker's MIPS final score for performance year 2024 is 98 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. John T. Walker see?
CMS counts 242 Medicare patients who saw Dr. Walker in 2024, with an average age of 71.
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What services does Dr. John T. Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were surgery: digestive system (45385), surgery: digestive system (45380) and surgery: digestive system (43239).
What drugs does Dr. John T. Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Peg 3350-Electrolyte, Omeprazole and Carvedilol.
Has Dr. John T. Walker received payments from drug or device companies?
CMS Open Payments shows $187 in general payments to Dr. Walker from 4 companies from 2017 to 2019. The largest total came from Covidien LP.
How long has Dr. John T. Walker been practicing?
Dr. Walker graduated from medical school in 2013, 13 years ago.
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