Proc Natl Acad Sci U S A
Dr. Michael C. Nelson, MD
- Medicare services, 2024
- 953
- Medicare patients, 2024
- 156
- Part D claims, 2024
- 9,080
- Publications
- 8
- Hospital affiliations
- 1
- Practice address
- 19950 W Rinaldi St, Porter Ranch, CA 91326
- Practice phone
- Call (661) 222-2600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Facey Medical Group
Porter Ranch, California
Find Dr. Nelson'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. Michael C. Nelson is an internist in Porter Ranch, California
Dr. Nelson practices at Facey Medical Group in Porter Ranch, California.
Dr. Nelson's NPI, 1346254968, was assigned on July 28, 2006. Dr. Nelson graduated from Keck School of Medicine of USC in 1984. Dr. Nelson holds California license G57167.
- NPI
- 1346254968NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577476670
- NPI enumeration date
- July 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (661) 222-2600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael C. Nelson practices at Facey Medical Group in Porter Ranch, California
Dr. Nelson's primary practice is Facey Medical Group, at 19950 W Rinaldi St, Porter Ranch, CA 91326 in Los Angeles County. The practice phone is (661) 222-2600.
- Facey Medical Group19950 W Rinaldi St, Porter Ranch, CA 91326 · Los Angeles CountyPhone(661) 222-2600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael C. Nelson is affiliated with 3 sites of care and 1 medical group
Dr. Nelson's primary practice is Facey Medical Group in Porter Ranch, California. Dr. Nelson is also affiliated with Providence Holy Cross Medical Center. The medical group on file is Facey Medical Group. Dmand AI also links Dr. Nelson to 1 more home health agency, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael C. Nelson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Nelson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Facey Medical Group | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael C. Nelson is one of 16,751 internists in California
Internal medicine is Dr. Nelson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Nelson is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Nelson's licenses on file in 2 states: California and Minnesota.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Minnesota license
Clinical focus
Dmand AI lists acid reflux, acute skin infection, alzheimer's disease, aneurysm, arthritis, asthma, atrial fibrillation and flutter and bladder disease among the conditions Dr. Nelson treats.
Internists near Dr. Nelson
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. Michael C. Nelson billed Medicare for 953 services in 2024
CMS data shows 953 Medicare services from Dr. Nelson across 14 procedure codes in 2024, for 156 Medicare patients. Medicare paid $48,569 for them. Every service was in an office.
Dr. Nelson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 2742024: 35128%
- Office and hospital visits
- 2023: 2132024: 25218%
- Other services
- 2023: 1132024: 17555%
- Tests and treatments
- 2023: 692024: 10857%
- Imaging
- 2023: 612024: 6710%
Dr. Nelson compared with the California median for internists, 2024
- Dr. Nelson
- California median
- Medicare services
- 953vs 3612.6 times
- Medicare patients
- 156vs 151Close to median
- Part D claims
- 8,358vs 42119.9 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Nelson'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.
Need commercial claims for Dr. Nelson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Nelson and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael C. Nelson treated 156 Medicare patients in 2024, average age 76
CMS counts 156 Medicare patients who saw Dr. Nelson in 2024. The largest group is 75 to 84, with 66 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Nelson's median patient age at 71, with 54% women.
Dr. Nelson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Nelson's Medicare patients by sex, 2024
- Women9058%
- Men6642%
Chronic conditions among Dr. Nelson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis45%
- Chronic kidney disease29%
- Ischemic heart disease28%
- Osteoporosis21%
- Depression19%
- Diabetes19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Nelson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women54%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael C. Nelson wrote 9,080 Medicare Part D claims in 2024
In 2024, Dr. Nelson wrote 9,080 Medicare Part D claims for 507 patients. 87% of them were for generic drugs. CMS names the drug for 8,358 of them, across 135 drugs with 11 or more claims each, at $759,454 in total drug cost. In 2023, CMS named 8,205 claims across 123 drugs.
Dr. Nelson's Part D claims by kind of drug, 2024
- Generic7,936 claims87%
- Brand-name1,106 claims12%
- Other38 claims0%
Dr. Nelson'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. Nelson's Part D claims, 2024
- Opioids3%245 of 9,080 claims
- Antibiotics2%180 of 9,080 claims
- Antipsychotics, patients 65 and over0%39 of 9,080 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: 8,2052024: 8,3582%
Drugs named by CMS: 135 in 2024, 123 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. Michael C. Nelson offers telehealth to Medicare patients
Dr. Nelson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Nelson as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Removal or shaving of skin growth: 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. Michael C. Nelson has 8 publications on record
Dmand AI links 8 papers to Dr. Nelson, published from 2003 to 2008. The most frequent topics are Receptors, Cytoplasmic and Nuclear, Transcription Factors and Adipose Tissue. Dr. Nelson has published most often in Proc Natl Acad Sci U S A. Dr. Nelson's most frequent co-authors are Jerrold Michael Olefsky, MD and Bruce D. Blumberg, MD.
Topics Dr. Nelson writes about most
- Receptors, Cytoplasmic and Nuclear
- Transcription Factors
- Adipose Tissue
- Gene Expression Regulation
- Liver
- Mice, Knockout
- Mice, Transgenic
- Nuclear Proteins
Dr. Nelson's most frequent co-authors
Recent publications by Dr. Nelson
Proc Natl Acad Sci U S A
Proc Natl Acad Sci U S A
See who Dr. Nelson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Nelson 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. Michael C. Nelson received $1,165 in industry payments from 2016 to 2025
CMS Open Payments shows 83 general payments to Dr. Nelson from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $698.
General payments to Dr. Nelson by program year, 2016 to 2025
Companies that paid Dr. Nelson the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael C. Nelson has 1 award and honors on record
Dmand AI lists 1 award for Dr. Nelson, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Nelson
- 2011
- CMS Stage 1 2012
Source: Dmand AI Professional Profile Data
Dr. Michael C. Nelson graduated from Keck School of Medicine of USC
Dr. Nelson graduated from Keck School of Medicine of USC in 1984. Dr. Nelson is a member of ACP and CMA.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Michael C. Nelson accepts plans from 11 insurance carriers
Dr. Nelson is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Aspirus Health Plan
- +3 more carriersWith a free account
Plan types Dr. Nelson accepts, by number of carriers
- PPO8
- Medicare7
- HMO5
- POS4
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Michael C. Nelson'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 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)Doctors and Clinicians Utilization Data (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) |
| 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. Michael C. Nelson
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. Michael C. Nelson's NPI number?
Dr. Michael C. Nelson's NPI number is 1346254968. It was assigned on July 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael C. Nelson?
Dr. Michael C. Nelson is an internist in Porter Ranch, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael C. Nelson practice?
Dr. Nelson practices at 19950 W Rinaldi St, Porter Ranch, CA 91326. Dr. Nelson's primary practice is Facey Medical Group in Porter Ranch, California. Dmand AI also links Dr. Nelson to 1 home health agency.
What is Dr. Michael C. Nelson's office phone number?
The practice phone on file for Dr. Nelson is (661) 222-2600.
What is Dr. Michael C. Nelson's medical license number?
Dr. Nelson holds California license G57167, one of the licenses on file in 2 states.
Which states has Dr. Michael C. Nelson been licensed in?
Dmand AI has state licenses on file for Dr. Nelson in California (1986 to 2026) and Minnesota (2012 to 2014).
Which hospitals is Dr. Michael C. Nelson affiliated with?
Dr. Nelson is affiliated with Providence Holy Cross Medical Center.
What medical group is Dr. Michael C. Nelson part of?
Dr. Nelson is linked to Facey Medical Group.
Does Dr. Michael C. Nelson accept Medicare?
Yes. CMS data shows Dr. Nelson billed Medicare for 953 services in 2024, and Dr. Nelson accepts Medicare assignment.
Does Dr. Michael C. Nelson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Nelson as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Michael C. Nelson see?
CMS counts 156 Medicare patients who saw Dr. Nelson in 2024, with an average age of 76.
Is Dr. Michael C. Nelson board certified?
Yes. Dr. Nelson is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Michael C. Nelson bill to Medicare?
In 2024, Dr. Nelson's most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and medicare service (G2211).
Where did Dr. Michael C. Nelson go to medical school?
Dr. Nelson graduated from Keck School of Medicine of USC in 1984.
What drugs does Dr. Michael C. Nelson prescribe most?
In 2024 Medicare Part D data, Dr. Nelson's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
Has Dr. Michael C. Nelson received payments from drug or device companies?
CMS Open Payments shows $1,165 in general payments to Dr. Nelson from 9 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Michael C. Nelson been practicing?
Dr. Nelson graduated from medical school in 1984, 42 years ago.
Does Dr. Michael C. Nelson do research?
Dmand AI links 8 publications to Dr. Nelson, published from 2003 to 2008.
Who does Dr. Michael C. Nelson publish with?
Dr. Nelson's most frequent co-authors are Jerrold Michael Olefsky, MD (2 shared papers) and Bruce D. Blumberg, MD (1 shared paper).
What insurance does Dr. Michael C. Nelson accept?
Dr. Nelson is in network with 11 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 8. Check the plan with the practice before a visit.
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