Dr. Nathaniel Hamilton Fleming, MD, MS

  • San Francisco, CA
  • Neurologist
NPI1316400245PAC ID1759700560
Medicare services, 2024
23
Medicare patients, 2024
47
Part D claims, 2024
22
Publications
15
MIPS score, 2024
87
Practice address
505 Parnassus Ave, Box 0296, San Francisco, CA 94143
Practice phone
Call (415) 353-2733
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UCSF Helen Diller Medical Center at Parnassus Heights

Hospital · San Francisco, California

See all 4 affiliations

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Dr. Nathaniel Hamilton Fleming is a neurologist in San Francisco, California

Dr. Fleming practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health.

Dr. Fleming's NPI, 1316400245, was assigned on April 8, 2019. Dr. Fleming graduated from Stanford University School Of Medicine in 2019. Dr. Fleming holds California license A177834.

NPI and contact details
Medicare PAC ID
1759700560
NPI enumeration date
April 8, 2019
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(415) 353-2733
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
33
Medical school graduation
2019

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Nathaniel Hamilton Fleming practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California

Dr. Fleming's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights, at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143 in San Francisco County. The practice phone is (415) 353-2733.

Source: Dmand AI Affiliation Data

Dr. Nathaniel Hamilton Fleming is affiliated with 2 sites of care and 2 medical groups

Dr. Fleming's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Fleming is also affiliated with MarinHealth Medical Center. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Fleming to 1 more medical group, named with a free account.

See all 4 affiliations for Dr. Fleming

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Nathaniel Hamilton Fleming's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fleming practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UCSF Helen Diller Medical Center at Parnassus HeightsAvailable with a free account
+1 more site and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Nathaniel Hamilton Fleming is one of 2,207 neurologists in California

Neurology is Dr. Fleming's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Fleming is board certified in neurology by the American Board of Psychiatry and Neurology. Dr. Fleming is licensed in California.

Specialties and state licenses

  • Neurology, CaliforniaPrimaryLicense A177834 · 2022 to 2026 · taxonomy 2084N0400X

Neurologists near Dr. Fleming

Counts of neurologists 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. Nathaniel Hamilton Fleming billed Medicare for 23 services in 2024

CMS data shows 23 Medicare services from Dr. Fleming across 1 procedure code in 2024, all of them office visits, for 47 Medicare patients. Medicare paid $2,840 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202423
Medicare patients47
Paid by Medicare$2,840
Procedure codes1

Dr. Fleming compared with the California median for neurologists, 2024

  • Dr. Fleming
  • California median
Medicare services
23vs 40494% below
Medicare patients
47vs 19075% below
Part D claims
18vs 32494% below

Medians across 1,995 neurologists in California with Dmand AI profiles that report each measure.

Dr. Fleming'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.

See all procedures by Dr. Fleming

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Nathaniel Hamilton Fleming treated 47 Medicare patients in 2024, average age 75

CMS counts 47 Medicare patients who saw Dr. Fleming in 2024. The largest group is 75 to 84, with 23 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 36% are also on Medicaid. Their average risk score is 1.56, 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. Fleming's median patient age at 71, with 51% women.

Medicare patients, 202447
Average age75
Average risk score1.56
Also on Medicaid36%

Dr. Fleming's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Fleming's Medicare patients by sex, 2024

  • Women2757%
  • Men2043%

Chronic conditions among Dr. Fleming's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Stroke or TIA75%
  4. Arthritis38%
  5. Diabetes38%
  6. Atrial fibrillation32%
  7. Mood disorders32%
  8. Chronic kidney disease26%

Share of Medicare patients with each condition. A patient can have several.

Dr. Fleming'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

  • Women51%
  • Men46%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Nathaniel Hamilton Fleming wrote 22 Medicare Part D claims in 2024

In 2024, Dr. Fleming wrote 22 Medicare Part D claims for 12 patients. 91% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $816 in total drug cost. In 2022, CMS named 31 claims across 2 drugs.

Part D claims, 202422
Drugs named by CMS1
Total drug cost$816
Part D patients12

Dr. Fleming's Part D claims by kind of drug, 2024

  • Generic20 claims91%
  • Brand-name and other2 claims9%

Dr. Fleming's most prescribed drugs by claims, 2023

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, 2022 to 2023

  • 2022
  • 2023
Claims for drugs CMS names
2022: 312023: 1842%

Drugs named by CMS: 1 in 2023, 2 in 2022.

See all prescribing by Dr. Fleming

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. Nathaniel Hamilton Fleming scored 87 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 87 out of 100 for Dr. Fleming for performance year 2024, reported as part of a group. Dr. Fleming accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fleming as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Fleming's MIPS scores, performance year 2024

  • 87of 100Final score
  • 86.8of 100Quality
  • 40of 100Improvement Activities
  • 70of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Nathaniel Hamilton Fleming has 15 publications on record

Dmand AI links 15 papers to Dr. Fleming, published from 2013 to 2023. 2013 was the busiest year, with 2. The most frequent topics are Melanoma, Skin Neoplasms and Melanoma, Cutaneous Malignant. Dr. Fleming has published most often in JAMA Dermatol. Dr. Fleming's most frequent co-authors are Russell Scott Berman, MD, Anna C. Pavlick, DO and Susan Marie Swetter, MD.

Papers15
Years published2013 to 2023

Dr. Fleming's papers by year, 2013 to 2023

Topics Dr. Fleming writes about most

  • Melanoma
  • Skin Neoplasms
  • Melanoma, Cutaneous Malignant
  • Biopsy
  • Dysplastic Nevus Syndrome
  • Margins of Excision
  • Skin
  • Antineoplastic Agents

Dr. Fleming's most frequent co-authors

Recent publications by Dr. Fleming

See all 15 publications and co-authors

See who Dr. Fleming researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fleming works with, so you can find a warm path to the right neurologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Nathaniel Hamilton Fleming graduated from Stanford University School Of Medicine

Dr. Fleming graduated from Stanford University School Of Medicine in 2019.

  1. Medical schoolStanford University School Of Medicine
  2. Board certified in neurologyAmerican Board of Psychiatry and Neurology
  3. Board certified in vascular neurologyAmerican Board of Psychiatry and Neurology

Source: Dmand AI Professional Profile Data

Dr. Nathaniel Hamilton Fleming accepts plans from 6 insurance carriers

Dr. Fleming is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Massachusetts
  • HCSC
  • Regence Health Plans
  • CMS Medicare
  • Molina

Plan types Dr. Fleming accepts, by number of carriers

  1. Medicare6
  2. PPO4
  3. EPO1
  4. HMO1
  5. POS1

Source: Dmand AI Insurance Network Data

Sources for Dr. Nathaniel Hamilton Fleming's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Nathaniel Hamilton Fleming

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. Nathaniel Hamilton Fleming's NPI number?

Dr. Nathaniel Hamilton Fleming's NPI number is 1316400245. It was assigned on April 8, 2019, and it is active in the NPI Registry.

What kind of doctor is Dr. Nathaniel Hamilton Fleming?

Dr. Nathaniel Hamilton Fleming is a neurologist in San Francisco, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).

Where does Dr. Nathaniel Hamilton Fleming practice?

Dr. Fleming practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Fleming's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dmand AI also links Dr. Fleming to 1 medical group.

What is Dr. Nathaniel Hamilton Fleming's office phone number?

The practice phone on file for Dr. Fleming is (415) 353-2733.

What is Dr. Nathaniel Hamilton Fleming's medical license number?

Dr. Fleming holds California license A177834.

Which hospitals is Dr. Nathaniel Hamilton Fleming affiliated with?

Dr. Fleming practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California. Dr. Fleming is also affiliated with MarinHealth Medical Center.

What medical group is Dr. Nathaniel Hamilton Fleming part of?

Dr. Fleming is linked to UCSF Pediatrics. Dmand AI links Dr. Fleming to 1 more medical group.

Does Dr. Nathaniel Hamilton Fleming accept Medicare?

Yes. CMS data shows Dr. Fleming billed Medicare for 23 services in 2024, and Dr. Fleming accepts Medicare assignment.

Does Dr. Nathaniel Hamilton Fleming offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Fleming as offering telehealth services.

What is Dr. Nathaniel Hamilton Fleming's MIPS score?

Dr. Fleming's MIPS final score for performance year 2024 is 87 out of 100, reported as part of a group.

Show 9 more questionsShow fewer questions

How many Medicare patients does Dr. Nathaniel Hamilton Fleming see?

CMS counts 47 Medicare patients who saw Dr. Fleming in 2024, with an average age of 75.

Is Dr. Nathaniel Hamilton Fleming board certified?

Yes. Dr. Fleming is board certified in neurology by the American Board of Psychiatry and Neurology.

What services does Dr. Nathaniel Hamilton Fleming bill to Medicare?

In 2024, Dr. Fleming's most billed Medicare services were office visit, established patient (99215).

Where did Dr. Nathaniel Hamilton Fleming go to medical school?

Dr. Fleming graduated from Stanford University School Of Medicine in 2019.

What drugs does Dr. Nathaniel Hamilton Fleming prescribe most?

In 2023 Medicare Part D data, Dr. Fleming's most prescribed drugs by claims were Carbidopa-Levodopa.

How long has Dr. Nathaniel Hamilton Fleming been practicing?

Dr. Fleming graduated from medical school in 2019, 7 years ago.

Does Dr. Nathaniel Hamilton Fleming do research?

Dmand AI links 15 publications to Dr. Fleming, published from 2013 to 2023.

Who does Dr. Nathaniel Hamilton Fleming publish with?

Dr. Fleming's most frequent co-authors are Russell Scott Berman, MD (5 shared papers), Anna C. Pavlick, DO (4 shared papers) and Susan Marie Swetter, MD (4 shared papers).

What insurance does Dr. Nathaniel Hamilton Fleming accept?

Dr. Fleming is in network with 6 carriers, including Aetna, Blue Cross Blue Shield of Massachusetts and HCSC. Medicare plans come from the most carriers, 6. Check the plan with the practice before a visit.

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