Dr. Christopher S. Johnson, MD
- Medicare services, 2019
- 106
- Part D claims, 2024
- 153
- Hospital affiliations
- 3
- Industry payments
- $240
- Medical groups
- 3
- Practice address
- 2033 Main Street, Athol, MA 01331
- Practice phone
- Call (978) 249-3511
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Christopher S. Johnson is an internist in Athol, Massachusetts
Dr. Johnson practices at Athol Hospital in Athol, Massachusetts, part of Heywood Healthcare.
Dr. Johnson's NPI, 1194711523, was assigned on September 21, 2005. Dr. Johnson graduated from State University of NY Upstate Medical University in 1987. Dr. Johnson holds Massachusetts license 72668.
- NPI
- 1194711523NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3173560810
- NPI enumeration date
- September 21, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 249-3511
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Christopher S. Johnson practices at Athol Hospital in Athol, Massachusetts
Dr. Johnson's primary practice is Athol Hospital, at 2033 Main Street, Athol, MA 01331 in Worcester County. The practice phone is (978) 249-3511.
- Athol Hospital2033 Main Street, Athol, MA 01331 · Worcester CountyPhone(978) 249-3511
Source: Dmand AI Affiliation Data
Dr. Christopher S. Johnson is affiliated with 3 sites of care and 3 medical groups
Dr. Johnson's primary practice is Athol Hospital in Athol, Massachusetts, part of Heywood Healthcare. Dr. Johnson is also affiliated with Boston Medical Center - South. The medical group on file is Athol Hospital. Dmand AI also links Dr. Johnson to 1 more hospital and 2 medical groups, each named with a free account. Dr. Johnson's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Christopher S. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Athol Hospital | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Christopher S. Johnson is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Johnson is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Johnson
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. Christopher S. Johnson billed Medicare for 106 services in 2019
CMS data shows 106 Medicare services from Dr. Johnson across 3 procedure codes in 2019. Medicare paid $6,000 for them. Every service was in an office.
Dr. Johnson's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 4342019: 8381%
- Imaging
- 2018: 112019: 23109%
- Tests and treatments
- 2018: 1692019: 0100%
Dr. Johnson compared with the Massachusetts median for internists, 2019
- Dr. Johnson
- Massachusetts median
- Medicare services
- 106vs 43175% below
- Part D claims
- 31vs 40292% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Johnson's most billed Medicare procedure codes, 2019
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. Johnson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnson and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Christopher S. Johnson's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 68, with 49% women.
Dr. Johnson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Christopher S. Johnson wrote 153 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 153 Medicare Part D claims for 122 patients. 93% of them were for generic drugs. CMS names the drug for 31 of them, across 2 drugs with 11 or more claims each, at $349 in total drug cost. In 2023, CMS named 40 claims across 3 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic143 claims93%
- Brand-name and other10 claims7%
Dr. Johnson'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. Johnson's Part D claims, 2024
- Opioids13%20 of 153 claims
- Antibiotics36%55 of 153 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: 402024: 3123%
Drugs named by CMS: 2 in 2024, 3 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
How Dr. Christopher S. Johnson takes part in Medicare
Dr. Johnson 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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Dr. Christopher S. Johnson received $240 in industry payments from 2017 to 2023
CMS Open Payments shows 3 general payments to Dr. Johnson from 2 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 100% of the total. Stryker Corporation paid the most, $173.
General payments to Dr. Johnson by program year, 2017 to 2023
Companies that paid Dr. Johnson the most, 2017 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Christopher S. Johnson graduated from State University of NY Upstate Medical University
Dr. Johnson graduated from State University of NY Upstate Medical University in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Christopher S. Johnson'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 Data |
| 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. Christopher S. Johnson
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. Christopher S. Johnson's NPI number?
Dr. Christopher S. Johnson's NPI number is 1194711523. It was assigned on September 21, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Christopher S. Johnson?
Dr. Christopher S. Johnson is an internist in Athol, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Christopher S. Johnson practice?
Dr. Johnson practices at 2033 Main Street, Athol, MA 01331. Dr. Johnson's primary practice is Athol Hospital in Athol, Massachusetts, part of Heywood Healthcare. Dmand AI also links Dr. Johnson to 1 hospital and 2 medical groups.
What is Dr. Christopher S. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (978) 249-3511.
What is Dr. Christopher S. Johnson's medical license number?
Dr. Johnson holds Massachusetts license 72668.
Which hospitals is Dr. Christopher S. Johnson affiliated with?
Dr. Johnson practices at Athol Hospital in Athol, Massachusetts. Dr. Johnson is also affiliated with Boston Medical Center - South. Dmand AI links Dr. Johnson to 1 more hospital.
What medical group is Dr. Christopher S. Johnson part of?
Dr. Johnson is linked to Athol Hospital. Dmand AI links Dr. Johnson to 2 more medical groups.
Does Dr. Christopher S. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 106 services in 2019, and Dr. Johnson accepts Medicare assignment.
What services does Dr. Christopher S. Johnson bill to Medicare?
In 2019, Dr. Johnson's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and diagnostic imaging (71046).
Where did Dr. Christopher S. Johnson go to medical school?
Dr. Johnson graduated from State University of NY Upstate Medical University in 1987.
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What drugs does Dr. Christopher S. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Levofloxacin and Oxycodone-Acetaminophen.
Has Dr. Christopher S. Johnson received payments from drug or device companies?
CMS Open Payments shows $240 in general payments to Dr. Johnson from 2 companies from 2017 to 2023. The largest total came from Stryker Corporation.
How long has Dr. Christopher S. Johnson been practicing?
Dr. Johnson graduated from medical school in 1987, 39 years ago.
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