Dr. John B. McCahan, MD
- Medicare services, 2024
- 366
- Medicare patients, 2024
- 138
- Part D claims, 2024
- 2,096
- Hospital affiliations
- 3
- Industry payments
- $128
- Practice address
- 33 E Main St, Westborough, MA 01581
- Practice phone
- Call (508) 334-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Umass Memorial Medical Group Inc
Westborough, Massachusetts
Find Dr. McCahan'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 B. McCahan is a pediatrician in Westborough, Massachusetts
Dr. McCahan practices at Umass Memorial Medical Group Inc in Westborough, Massachusetts.
Dr. McCahan's NPI, 1225012354, was assigned on December 1, 2005. Dr. McCahan graduated from University of Massachusetts Medical School in 1993. Dr. McCahan holds Massachusetts license 151640.
- NPI
- 1225012354NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3476659467
- NPI enumeration date
- December 1, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (508) 334-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John B. McCahan practices at Umass Memorial Medical Group Inc in Westborough, Massachusetts
Dr. McCahan's primary practice is Umass Memorial Medical Group Inc, at 33 E Main St, Westborough, MA 01581 in Worcester County. The practice phone is (508) 334-1000.
- Umass Memorial Medical Group Inc33 E Main St, Westborough, MA 01581 · Worcester CountyPhone(508) 334-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John B. McCahan is affiliated with 7 sites of care and 1 medical group
Dr. McCahan's primary practice is Umass Memorial Medical Group Inc in Westborough, Massachusetts. Dr. McCahan is also affiliated with UMass Memorial Medical Center - University Campus. The medical group on file is UMass Memorial Medical Group. Dmand AI also links Dr. McCahan to 2 more hospitals, 2 home health agencies and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John B. McCahan's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McCahan practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Umass Memorial Medical Group Inc | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John B. McCahan is one of 2,101 pediatricians in Massachusetts
Pediatrics is Dr. McCahan's primary specialty in the NPI Registry, under taxonomy code 208000000X. Dr. McCahan is licensed in Massachusetts.
Specialties and state licenses
- Pediatrics, MassachusettsPrimary
Pediatricians near Dr. McCahan
Counts of pediatricians 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 B. McCahan billed Medicare for 366 services in 2024
CMS data shows 366 Medicare services from Dr. McCahan across 10 procedure codes in 2024, for 138 Medicare patients. Medicare paid $20,123 for them. Every service was in an office.
Dr. McCahan's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1922024: 1952%
- Other services
- 2023: 932024: 14455%
- Tests and treatments
- 2023: 212024: 2729%
Dr. McCahan compared with the Massachusetts median for pediatricians, 2024
- Dr. McCahan
- Massachusetts median
- Medicare services
- 366vs 1462.5 times
- Medicare patients
- 138vs 9053% above
- Part D claims
- 1,674vs 2083.7 times
Medians across 283 pediatricians in Massachusetts with Dmand AI profiles that report each measure.
Dr. McCahan'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 B. McCahan treated 138 Medicare patients in 2024, average age 72
CMS counts 138 Medicare patients who saw Dr. McCahan in 2024. The largest group is 65 to 74, with 67 patients. 72% of them have high blood pressure, and 70% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. McCahan's median patient age at 58, with 42% women.
Dr. McCahan's Medicare patients by age, 2024
Dr. McCahan's Medicare patients by sex, 2024
- Women6245%
- Men7655%
Chronic conditions among Dr. McCahan's Medicare patients, 2024
- High blood pressure72%
- High cholesterol70%
- Arthritis30%
- Diabetes30%
- Chronic kidney disease26%
- Ischemic heart disease25%
- Anxiety22%
- Depression17%
Share of Medicare patients with each condition. A patient can have several.
Dr. McCahan's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women42%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John B. McCahan wrote 2,096 Medicare Part D claims in 2024
In 2024, Dr. McCahan wrote 2,096 Medicare Part D claims for 204 patients. 89% of them were for generic drugs. CMS names the drug for 1,674 of them, across 48 drugs with 11 or more claims each, at $148,503 in total drug cost. In 2023, CMS named 1,351 claims across 44 drugs.
Dr. McCahan's Part D claims by kind of drug, 2024
- Generic1,858 claims89%
- Brand-name219 claims10%
- Other19 claims1%
Dr. McCahan'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. McCahan's Part D claims, 2024
- Opioids3%69 of 2,096 claims
- Antibiotics1%24 of 2,096 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: 1,3512024: 1,67424%
Drugs named by CMS: 48 in 2024, 44 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 B. McCahan offers telehealth to Medicare patients
Dr. McCahan accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. McCahan as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John B. McCahan received $128 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. McCahan from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Smith & Nephew, Inc. paid the most, $128.
Companies that paid Dr. McCahan the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John B. McCahan graduated from University of Massachusetts Medical School
Dr. McCahan graduated from University of Massachusetts Medical School in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John B. McCahan'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 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 B. McCahan
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 B. McCahan's NPI number?
Dr. John B. McCahan's NPI number is 1225012354. It was assigned on December 1, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John B. McCahan?
Dr. John B. McCahan is a pediatrician in Westborough, Massachusetts. The primary specialty in the NPI Registry is Pediatrics Physician (taxonomy code 208000000X).
Where does Dr. John B. McCahan practice?
Dr. McCahan practices at 33 E Main St, Westborough, MA 01581. Dr. McCahan's primary practice is Umass Memorial Medical Group Inc in Westborough, Massachusetts. Dmand AI also links Dr. McCahan to 2 hospitals, 2 home health agencies and 1 group practice or clinic.
What is Dr. John B. McCahan's office phone number?
The practice phone on file for Dr. McCahan is (508) 334-1000.
What is Dr. John B. McCahan's medical license number?
Dr. McCahan holds Massachusetts license 151640.
Which hospitals is Dr. John B. McCahan affiliated with?
Dr. McCahan is affiliated with UMass Memorial Medical Center - University Campus. Dmand AI links Dr. McCahan to 2 more hospitals.
What medical group is Dr. John B. McCahan part of?
Dr. McCahan is linked to UMass Memorial Medical Group.
Does Dr. John B. McCahan accept Medicare?
Yes. CMS data shows Dr. McCahan billed Medicare for 366 services in 2024, and Dr. McCahan accepts Medicare assignment.
Does Dr. John B. McCahan offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. McCahan as offering telehealth services.
How many Medicare patients does Dr. John B. McCahan see?
CMS counts 138 Medicare patients who saw Dr. McCahan in 2024, with an average age of 72.
Show 5 more questionsShow fewer questions
What services does Dr. John B. McCahan bill to Medicare?
In 2024, Dr. McCahan's most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99213).
Where did Dr. John B. McCahan go to medical school?
Dr. McCahan graduated from University of Massachusetts Medical School in 1993.
What drugs does Dr. John B. McCahan prescribe most?
In 2024 Medicare Part D data, Dr. McCahan's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. John B. McCahan received payments from drug or device companies?
CMS Open Payments shows $128 in general payments to Dr. McCahan from 1 company from 2018 to 2018. The largest total came from Smith & Nephew, Inc.
How long has Dr. John B. McCahan been practicing?
Dr. McCahan graduated from medical school in 1993, 33 years ago.
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