Dr. John Michael Hewitt, MD
- Medicare services, 2023
- 805
- Part D claims, 2024
- 422
- Hospital affiliations
- 1
- Industry payments
- $14,071
- Medical group
- 1
- Practice address
- 757 Westwood Plaza, Los Angeles, CA 90095
- Practice phone
- Call (310) 825-6301
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. John Michael Hewitt is an internist in Los Angeles, California
Dr. Hewitt practices at Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health.
Dr. Hewitt's NPI, 1396833265, was assigned on October 10, 2006. Dr. Hewitt holds California license C42525.
- NPI
- 1396833265NPI Registry (opens in a new tab)
- NPI enumeration date
- October 10, 2006
- NPI status
- Active
- Practice phone
- (310) 825-6301
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Michael Hewitt practices at Ronald Reagan UCLA Medical Center in Los Angeles, California
Dr. Hewitt's primary practice is Ronald Reagan UCLA Medical Center, at 757 Westwood Plaza, Los Angeles, CA 90095 in Los Angeles County. The practice phone is (310) 825-6301.
- Ronald Reagan UCLA Medical Center757 Westwood Plaza, Los Angeles, CA 90095 · Los Angeles CountyPhone(310) 825-6301
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Michael Hewitt is affiliated with 2 sites of care and 1 medical group
Dr. Hewitt's primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Hewitt to 1 more physician office, named with a free account.
Sources: Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Michael Hewitt's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hewitt practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ronald Reagan UCLA 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 Michael Hewitt is one of 16,751 internists in California
Internal medicine is Dr. Hewitt's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Hewitt is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Hewitt
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 Michael Hewitt billed Medicare for 805 services in 2023
CMS data shows 805 Medicare services from Dr. Hewitt across 6 procedure codes in 2023. Medicare paid $41,864 for them. Every service was in an office.
Dr. Hewitt's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 7182023: 53226%
- Surgery
- 2022: 3142023: 20933%
- Other services
- 2022: 1892023: 5272%
- Tests and treatments
- 2022: 1122023: 1289%
- Drugs given in the office
- 2022: 472023: 0100%
- Lab and pathology
- 2022: 322023: 0100%
Dr. Hewitt compared with the California median for internists, 2023
- Dr. Hewitt
- California median
- Medicare services
- 805vs 3612.2 times
- Part D claims
- 146vs 42165% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Hewitt's most billed Medicare procedure codes, 2023
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. Hewitt?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hewitt and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Michael Hewitt's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Hewitt's median patient age at 63, with 45% women.
Dr. Hewitt'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
- Women45%
- Men55%
Source: Dmand AI Patient Panel Data
Dr. John Michael Hewitt wrote 422 Medicare Part D claims in 2024
In 2024, Dr. Hewitt wrote 422 Medicare Part D claims for 211 patients. 82% of them were for generic drugs. CMS names the drug for 146 of them, across 7 drugs with 11 or more claims each, at $2,688 in total drug cost. In 2023, CMS named 1,572 claims across 56 drugs.
Dr. Hewitt's Part D claims by kind of drug, 2024
- Generic345 claims82%
- Brand-name and other77 claims18%
Dr. Hewitt'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. Hewitt's Part D claims, 2024
- Antibiotics15%65 of 422 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: 1,5722024: 14691%
Drugs named by CMS: 7 in 2024, 56 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
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Dr. John Michael Hewitt received $14,071 in industry payments from 2016 to 2023
CMS Open Payments shows 478 general payments to Dr. Hewitt from 33 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 64% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $7,102.
General payments to Dr. Hewitt by program year, 2016 to 2023
General payments to Dr. Hewitt by kind, 2016 to 2023
- Food and beverage$9,07264%
- Speaker and faculty fees$2,50018%
- Consulting fees$1,2509%
- Travel and lodging$1,2349%
- Education$150%
Companies that paid Dr. Hewitt the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. John Michael Hewitt'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 DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Michael Hewitt
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What is Dr. John Michael Hewitt's NPI number?
Dr. John Michael Hewitt's NPI number is 1396833265. It was assigned on October 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Michael Hewitt?
Dr. John Michael Hewitt is an internist in Los Angeles, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Michael Hewitt practice?
Dr. Hewitt practices at 757 Westwood Plaza, Los Angeles, CA 90095. Dr. Hewitt's primary practice is Ronald Reagan UCLA Medical Center in Los Angeles, California, part of University of California Health. Dmand AI also links Dr. Hewitt to 1 physician office.
What is Dr. John Michael Hewitt's office phone number?
The practice phone on file for Dr. Hewitt is (310) 825-6301.
What is Dr. John Michael Hewitt's medical license number?
Dr. Hewitt holds California license C42525.
Which hospitals is Dr. John Michael Hewitt affiliated with?
Dr. Hewitt practices at Ronald Reagan UCLA Medical Center in Los Angeles, California.
What medical group is Dr. John Michael Hewitt part of?
Dr. Hewitt is linked to The Permanente Medical Group, Inc.
Does Dr. John Michael Hewitt accept Medicare?
Yes. CMS data shows Dr. Hewitt billed Medicare for 805 services in 2023.
What services does Dr. John Michael Hewitt bill to Medicare?
In 2023, Dr. Hewitt's most billed Medicare services were office visit, established patient (99213), surgery: heart and blood vessels (36415) and office visit, established patient (99214).
What drugs does Dr. John Michael Hewitt prescribe most?
In 2024 Medicare Part D data, Dr. Hewitt's most prescribed drugs by claims were Albuterol Sulfate Hfa, Methylprednisolone and Doxycycline Hyclate.
Has Dr. John Michael Hewitt received payments from drug or device companies?
CMS Open Payments shows $14,071 in general payments to Dr. Hewitt from 33 companies from 2016 to 2023. The largest total came from Teva Pharmaceuticals USA, Inc.
How long has Dr. John Michael Hewitt been practicing?
Dr. Hewitt graduated from medical school in 1975, 51 years ago.
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