Dr. Ronald M. Johnson, MD
- Medicare services, 2024
- 47
- Medicare patients, 2024
- 23
- Hospital affiliations
- 1
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942
- Practice phone
- Call (619) 465-0711
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Ronald M. Johnson is a general surgeon in La Mesa, California
Dr. Johnson practices at Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare.
Dr. Johnson's NPI, 1477672046, was assigned on March 28, 2007. Dr. Johnson graduated from University of Illinois College of Medicine - Chicago in 1968. Dr. Johnson's California license number on file is G19831.
- NPI
- 1477672046NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890689855
- NPI enumeration date
- March 28, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (619) 465-0711
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 84
- Medical school graduation
- 1968
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald M. Johnson practices at Sharp Grossmont Hospital in La Mesa, California
Dr. Johnson's primary practice is Sharp Grossmont Hospital, at 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942 in San Diego County. The practice phone is (619) 465-0711.
- Sharp Grossmont Hospital5555 Grossmont Center Drive Box 58, La Mesa, CA 91942 · San Diego CountyPhone(619) 465-0711
Source: Dmand AI Affiliation Data
Dr. Ronald M. Johnson is affiliated with 1 site of care and 1 medical group
Dr. Johnson's primary practice is Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare. The medical group on file is Emergency and Acute Care Medical Corporation. 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. Ronald M. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sharp Grossmont Hospital | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald M. Johnson is one of 2,926 general surgeons in California
Surgery is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Johnson is board certified in surgery by the American Board of Surgery. Dmand AI has Dr. Johnson's licenses on file in 2 states: California and Colorado.
Specialties and state licenses
- Surgery, CaliforniaPrimary
- Colorado license
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. Ronald M. Johnson billed Medicare for 47 services in 2024
CMS data shows 47 Medicare services from Dr. Johnson across 2 procedure codes in 2024, for 23 Medicare patients. Medicare paid $2,703 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Johnson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 1372024: 4766%
Dr. Johnson compared with the California median for general surgeons, 2024
- Dr. Johnson
- California median
- Medicare services
- 47vs 16672% below
- Medicare patients
- 23vs 12181% below
Medians across 2,606 general surgeons in California 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnson and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald M. Johnson treated 23 Medicare patients in 2024, average age 74
CMS counts 23 Medicare patients who saw Dr. Johnson in 2024. 75% of them have arthritis, and 75% have high cholesterol. Their average risk score is 1.32, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 65, with 64% women.
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- Arthritis75%
- High cholesterol75%
- High blood pressure74%
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 65
Patient panel by sex, all payers
- Women64%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald M. Johnson ranks in the 79th percentile for laminectomy or laminotomy (partial removal of spine bones) in Medicare
Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 54 procedures of laminectomy or laminotomy (partial removal of spine bones) by Dr. Johnson, more than 79% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Johnson ranks in Medicare procedure volume
- Spinal fusion
- 59th percentile57 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 79th percentile54 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Hip replacement: 1 to 10 procedures (CMS shows small counts as a range)
Knee replacement: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Ronald M. Johnson has 1 award and honors on record
Dmand AI lists 1 award for Dr. Johnson.
Awards and honors for Dr. Johnson
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Ronald M. Johnson graduated from University of Illinois College of Medicine - Chicago
Dr. Johnson graduated from University of Illinois College of Medicine - Chicago in 1968. Dr. Johnson is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Ronald M. Johnson accepts plans from 1 insurance carrier
Dr. Johnson is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for Dr. Ronald M. 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 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Ronald M. 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. Ronald M. Johnson's NPI number?
Dr. Ronald M. Johnson's NPI number is 1477672046. It was assigned on March 28, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald M. Johnson?
Dr. Ronald M. Johnson is a general surgeon in La Mesa, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Ronald M. Johnson practice?
Dr. Johnson practices at 5555 Grossmont Center Drive Box 58, La Mesa, CA 91942. Dr. Johnson's primary practice is Sharp Grossmont Hospital in La Mesa, California, part of Sharp HealthCare.
What is Dr. Ronald M. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (619) 465-0711.
What is Dr. Ronald M. Johnson's medical license number?
Dr. Johnson's California license number on file is G19831, one of the licenses on file in 2 states.
Which states has Dr. Ronald M. Johnson been licensed in?
Dmand AI has state licenses on file for Dr. Johnson in California (1970 to 2025) and Colorado (1972 to 1989).
Which hospitals is Dr. Ronald M. Johnson affiliated with?
Dr. Johnson practices at Sharp Grossmont Hospital in La Mesa, California.
What medical group is Dr. Ronald M. Johnson part of?
Dr. Johnson is linked to Emergency and Acute Care Medical Corporation.
Does Dr. Ronald M. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 47 services in 2024, and Dr. Johnson accepts Medicare assignment.
How many Medicare patients does Dr. Ronald M. Johnson see?
CMS counts 23 Medicare patients who saw Dr. Johnson in 2024, with an average age of 74.
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Is Dr. Ronald M. Johnson board certified?
Yes. Dr. Johnson is board certified in surgery by the American Board of Surgery.
What services does Dr. Ronald M. Johnson bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were surgery: brain, spine and nerves (63048) and surgery: brain, spine and nerves (63047).
Where did Dr. Ronald M. Johnson go to medical school?
Dr. Johnson graduated from University of Illinois College of Medicine - Chicago in 1968.
How long has Dr. Ronald M. Johnson been practicing?
Dr. Johnson graduated from medical school in 1968, 58 years ago.
What insurance does Dr. Ronald M. Johnson accept?
Dr. Johnson is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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