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Dr. John N. Mafi, MD
NPI1063649465PAC ID6103074448
- Medicare services, 2024
- 82
- Medicare patients, 2024
- 54
- Part D claims, 2024
- 684
- Publications
- 17
- Hospital affiliations
- 2
- Practice address
- 2509 Pico Blvd, Santa Monica, CA 90405
- Practice phone
- Call (310) 664-7920
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Simms/Mann Health and Wellness Center
FQHC - Main Site · Santa Monica, California
Find Dr. Mafi'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 N. Mafi is an internist in Santa Monica, California
Dr. Mafi practices at Simms/Mann Health and Wellness Center in Santa Monica, California.
Dr. Mafi's NPI, 1063649465, was assigned on June 12, 2009. Dr. Mafi graduated from Cleveland Medical College, Homeopathic in 2009. Dr. Mafi holds California license A137497.
NPI and contact details
- NPI
- 1063649465NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6103074448
- NPI enumeration date
- June 12, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (310) 664-7920
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John N. Mafi practices at Simms/Mann Health and Wellness Center in Santa Monica, California
Dr. Mafi's primary practice is Simms/Mann Health and Wellness Center, at 2509 Pico Blvd, Santa Monica, CA 90405 in Los Angeles County. The practice phone is (310) 664-7920.
- Simms/Mann Health and Wellness Center2509 Pico Blvd, Santa Monica, CA 90405 · Los Angeles CountyPhone(310) 664-7920
Source: Dmand AI Affiliation Data
Dr. John N. Mafi is affiliated with 5 sites of care and 2 medical groups
Dr. Mafi's primary practice is Simms/Mann Health and Wellness Center in Santa Monica, California. Dr. Mafi is also affiliated with UCLA Santa Monica Medical Center. The medical group on file is UCLA Medical Group. Dmand AI also links Dr. Mafi to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Simms/Mann Health and Wellness CenterPrimary
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John N. Mafi's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mafi practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Simms/Mann Health and Wellness Center | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. John N. Mafi is one of 16,751 internists in California
Internal medicine is Dr. Mafi's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mafi is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Mafi's licenses on file in 3 states: California, Massachusetts and Ohio.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Massachusetts license
- Ohio license
Clinical focus
Dmand AI lists acid reflux, adjustment disease, alzheimer's disease, chronic anemia, chronic diabetes, chronic embolism thrombosis, chronic hypertension and coronary artery disease among the conditions Dr. Mafi treats.
Internists near Dr. Mafi
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 N. Mafi billed Medicare for 82 services in 2024
CMS data shows 82 Medicare services from Dr. Mafi across 2 procedure codes in 2024, for 54 Medicare patients. Medicare paid $4,497 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202482
Medicare patients54
Paid by Medicare$4,497
Procedure codes2
Dr. Mafi's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 982024: 6732%
- Other services
- 2023: 132024: 1515%
Dr. Mafi compared with the California median for internists, 2024
- Dr. Mafi
- California median
- Medicare services
- 82vs 36177% below
- Medicare patients
- 54vs 15164% below
- Part D claims
- 255vs 42139% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Mafi'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. Mafi and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John N. Mafi treated 54 Medicare patients in 2024, average age 78
CMS counts 54 Medicare patients who saw Dr. Mafi in 2024. The largest group is 75 to 84, with 18 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 28% are also on Medicaid. Their average risk score is 1.73, 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. Mafi's median patient age at 59, with 50% women.
Medicare patients, 202454
Average age78
Average risk score1.73
Also on Medicaid28%
Dr. Mafi's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Mafi's Medicare patients by sex, 2024
- Women2546%
- Men2954%
Chronic conditions among Dr. Mafi's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis67%
- Ischemic heart disease52%
- Diabetes41%
- Chronic kidney disease39%
- Heart failure33%
- Osteoporosis31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mafi's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women50%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John N. Mafi wrote 684 Medicare Part D claims in 2024
In 2024, Dr. Mafi wrote 684 Medicare Part D claims for 70 patients. 80% of them were for generic drugs. CMS names the drug for 255 of them, across 13 drugs with 11 or more claims each, at $18,119 in total drug cost. In 2023, CMS named 210 claims across 12 drugs.
Part D claims, 2024684
Drugs named by CMS13
Total drug cost$18,119
Part D patients70
Dr. Mafi's Part D claims by kind of drug, 2024
- Generic550 claims80%
- Brand-name and other134 claims20%
Dr. Mafi'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2102024: 25521%
Drugs named by CMS: 13 in 2024, 12 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 N. Mafi offers telehealth to Medicare patients
Dr. Mafi accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Mafi as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. John N. Mafi has 17 publications on record
Dmand AI links 17 papers to Dr. Mafi, published from 2013 to 2025. 2013 was the busiest year, with 2. Dr. Mafi's most frequent co-authors are Joseph Abiodun Ladapo, MD, PhD, Malvin Devon Anders, MD and Jesse Lee Berry, MD.
Papers17
Years published2013 to 2025
Dr. Mafi's papers by year, 2013 to 2025
Dr. Mafi's most frequent co-authors
- Joseph Abiodun Ladapo, MD, PhD2 shared papers
- Malvin Devon Anders, MD1 shared paper
- Jesse Lee Berry, MD1 shared paper
Recent publications by Dr. Mafi
See who Dr. Mafi researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mafi works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John N. Mafi received $122 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Mafi from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Teva Pharmaceuticals USA, Inc. paid the most, $122.
Companies that paid Dr. Mafi the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John N. Mafi graduated from Cleveland Medical College, Homeopathic
Dr. Mafi graduated from Cleveland Medical College, Homeopathic in 2009.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. John N. Mafi accepts plans from 6 insurance carriers
Dr. Mafi is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Mafi accepts, by number of carriers
- Medicare6
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John N. Mafi'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) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. John N. Mafi
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 N. Mafi's NPI number?
Dr. John N. Mafi's NPI number is 1063649465. It was assigned on June 12, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. John N. Mafi?
Dr. John N. Mafi is an internist in Santa Monica, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John N. Mafi practice?
Dr. Mafi practices at 2509 Pico Blvd, Santa Monica, CA 90405. Dr. Mafi's primary practice is Simms/Mann Health and Wellness Center in Santa Monica, California. Dmand AI also links Dr. Mafi to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. John N. Mafi's office phone number?
The practice phone on file for Dr. Mafi is (310) 664-7920.
What is Dr. John N. Mafi's medical license number?
Dr. Mafi holds California license A137497, one of the licenses on file in 3 states.
Which states has Dr. John N. Mafi been licensed in?
Dmand AI has state licenses on file for Dr. Mafi in California (2015 to 2026), Massachusetts (2012 to 2016) and Ohio (2014 to 2016).
Which hospitals is Dr. John N. Mafi affiliated with?
Dr. Mafi is affiliated with UCLA Santa Monica Medical Center. Dmand AI links Dr. Mafi to 1 more hospital.
What medical group is Dr. John N. Mafi part of?
Dr. Mafi is linked to UCLA Medical Group. Dmand AI links Dr. Mafi to 1 more medical group.
Does Dr. John N. Mafi accept Medicare?
Yes. CMS data shows Dr. Mafi billed Medicare for 82 services in 2024, and Dr. Mafi accepts Medicare assignment.
Does Dr. John N. Mafi offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Mafi as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. John N. Mafi see?
CMS counts 54 Medicare patients who saw Dr. Mafi in 2024, with an average age of 78.
Is Dr. John N. Mafi board certified?
Yes. Dr. Mafi is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. John N. Mafi bill to Medicare?
In 2024, Dr. Mafi's most billed Medicare services were office visit, established patient (99214) and medicare service (G0439).
Where did Dr. John N. Mafi go to medical school?
Dr. Mafi graduated from Cleveland Medical College, Homeopathic in 2009.
What drugs does Dr. John N. Mafi prescribe most?
In 2024 Medicare Part D data, Dr. Mafi's most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Rosuvastatin Calcium.
Has Dr. John N. Mafi received payments from drug or device companies?
CMS Open Payments shows $122 in general payments to Dr. Mafi from 1 company from 2025 to 2025. The largest total came from Teva Pharmaceuticals USA, Inc.
How long has Dr. John N. Mafi been practicing?
Dr. Mafi graduated from medical school in 2009, 17 years ago.
Does Dr. John N. Mafi do research?
Dmand AI links 17 publications to Dr. Mafi, published from 2013 to 2025.
Who does Dr. John N. Mafi publish with?
Dr. Mafi's most frequent co-authors are Joseph Abiodun Ladapo, MD, PhD (2 shared papers), Malvin Devon Anders, MD (1 shared paper) and Jesse Lee Berry, MD (1 shared paper).
What insurance does Dr. John N. Mafi accept?
Dr. Mafi is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.
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