Dr. Jonathan Ashely Collis Johnson, MD
- Medicare services, 2024
- 3,963
- Medicare patients, 2024
- 408
- Hospital affiliations
- 1
- Industry payments
- $398,535
- Medical groups
- 2
- Practice address
- 701 King Farm Blvd, Rockville, MD 20850
- Practice phone
- Call (301) 780-4745
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Maryland Medical Group, Inc
Rockville, Maryland
Find Dr. Johnson'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. Jonathan Ashely Collis Johnson is a general surgeon in Rockville, Maryland
Dr. Johnson practices at Maryland Medical Group, Inc in Rockville, Maryland.
Dr. Johnson's NPI, 1992953749, was assigned on September 5, 2008. Dr. Johnson graduated from Meharry Medical College School of Medicine in 2006. Dr. Johnson holds Maryland license D0071192.
- NPI
- 1992953749NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597936856
- NPI enumeration date
- September 5, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (301) 780-4745
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Ashely Collis Johnson practices at Maryland Medical Group, Inc in Rockville, Maryland
Dr. Johnson's primary practice is Maryland Medical Group, Inc, at 701 King Farm Blvd, Rockville, MD 20850 in Montgomery County. The practice phone is (301) 780-4745.
- Maryland Medical Group, Inc701 King Farm Blvd, Rockville, MD 20850 · Montgomery CountyPhone(301) 780-4745
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jonathan Ashely Collis Johnson is affiliated with 5 sites of care and 2 medical groups
Dr. Johnson's primary practice is Maryland Medical Group, Inc in Rockville, Maryland. Dr. Johnson is also affiliated with BridgePoint Continuing Care Hospital - National Harborside. The medical group on file is Comprehensive Wound Care Services. Dmand AI also links Dr. Johnson to 2 more group practices and clinics, 1 physician office and 1 medical group, 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. Jonathan Ashely Collis Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Maryland Medical Group, Inc | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan Ashely Collis Johnson is one of 532 general surgeons in Maryland
Surgery is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Johnson is licensed in Maryland.
Specialties and state licenses
- Surgery, MarylandPrimary
General surgeons near Dr. Johnson
Counts of general surgeons 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. Jonathan Ashely Collis Johnson billed Medicare for 3,963 services in 2024
CMS data shows 3,963 Medicare services from Dr. Johnson across 20 procedure codes in 2024, for 408 Medicare patients. Medicare paid $2,375,832 for them.
Dr. Johnson's Medicare services by type, 2024
- Other services1,984
- Office and hospital visits1,420
- Surgery559
Where Dr. Johnson's Medicare services took place, 2024
- In an office2,60066%
- In a facility1,36334%
Dr. Johnson compared with the Maryland median for general surgeons, 2024
- Dr. Johnson
- Maryland median
- Medicare services
- 3,963vs 23017.2 times
- Medicare patients
- 408vs 1622.5 times
Medians across 485 general surgeons in Maryland with Dmand AI profiles that report each measure.
Dr. Johnson'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. Jonathan Ashely Collis Johnson treated 408 Medicare patients in 2024, average age 81
CMS counts 408 Medicare patients who saw Dr. Johnson in 2024. The largest group is 85 and over, with 167 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 37% are also on Medicaid. Their average risk score is 2.92, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 81, with 51% women.
Dr. Johnson's Medicare patients by age, 2024
Dr. Johnson's Medicare patients by sex, 2024
- Women25061%
- Men15839%
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders63%
- Arthritis60%
- Chronic kidney disease54%
- Alzheimer's and dementia53%
- Diabetes52%
- Depression51%
Share of Medicare patients with each condition. A patient can have several.
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 81
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan Ashely Collis Johnson ranks in the 98th percentile for removal of tissue in Medicare
Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 617 procedures of removal of tissue by Dr. Johnson, more than 98% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Johnson ranks in Medicare procedure volume
- Removal of tissue
- 98th percentile617 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jonathan Ashely Collis Johnson received $398,535 in industry payments from 2024 to 2025
CMS Open Payments shows 27 general payments to Dr. Johnson from 5 drug and device companies from 2024 to 2025. Debt forgiveness make up the largest share, 79% of the total. ConvaTec Inc. paid the most, $316,800.
General payments to Dr. Johnson by program year, 2024 to 2025
General payments to Dr. Johnson by kind, 2024 to 2025
- Debt forgiveness$316,80079%
- Consulting fees$81,00020%
- Food and beverage$7350%
Companies that paid Dr. Johnson the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jonathan Ashely Collis Johnson graduated from Meharry Medical College School of Medicine
Dr. Johnson graduated from Meharry Medical College School of Medicine in 2006.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jonathan Ashely Collis 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 | 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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. Jonathan Ashely Collis 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. Jonathan Ashely Collis Johnson's NPI number?
Dr. Jonathan Ashely Collis Johnson's NPI number is 1992953749. It was assigned on September 5, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Ashely Collis Johnson?
Dr. Jonathan Ashely Collis Johnson is a general surgeon in Rockville, Maryland. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Jonathan Ashely Collis Johnson practice?
Dr. Johnson practices at 701 King Farm Blvd, Rockville, MD 20850. Dr. Johnson's primary practice is Maryland Medical Group, Inc in Rockville, Maryland. Dmand AI also links Dr. Johnson to 2 group practices and clinics, 1 physician office and 1 medical group.
What is Dr. Jonathan Ashely Collis Johnson's office phone number?
The practice phone on file for Dr. Johnson is (301) 780-4745.
What is Dr. Jonathan Ashely Collis Johnson's medical license number?
Dr. Johnson holds Maryland license D0071192.
Which hospitals is Dr. Jonathan Ashely Collis Johnson affiliated with?
Dr. Johnson is affiliated with BridgePoint Continuing Care Hospital - National Harborside.
What medical group is Dr. Jonathan Ashely Collis Johnson part of?
Dr. Johnson is linked to Comprehensive Wound Care Services. Dmand AI links Dr. Johnson to 1 more medical group.
Does Dr. Jonathan Ashely Collis Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 3,963 services in 2024, and Dr. Johnson accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan Ashely Collis Johnson see?
CMS counts 408 Medicare patients who saw Dr. Johnson in 2024, with an average age of 81.
What services does Dr. Jonathan Ashely Collis Johnson bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were medicare temporary code (Q4205), medicare temporary code (Q4191) and nursing facility care (99309).
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Where did Dr. Jonathan Ashely Collis Johnson go to medical school?
Dr. Johnson graduated from Meharry Medical College School of Medicine in 2006.
Has Dr. Jonathan Ashely Collis Johnson received payments from drug or device companies?
CMS Open Payments shows $398,535 in general payments to Dr. Johnson from 5 companies from 2024 to 2025. The largest total came from ConvaTec Inc.
How long has Dr. Jonathan Ashely Collis Johnson been practicing?
Dr. Johnson graduated from medical school in 2006, 20 years ago.
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