Dr. Mark A. Terrelonge Jr., MD, MPH

  • San Francisco, CA
  • Neurologist
NPI1366837734PAC ID1052662780
Medicare services, 2024
450
Medicare patients, 2024
137
Part D claims, 2024
395
Publications
6
MIPS score, 2024
97
Practice address
505 Parnassus Ave, Box 0296, San Francisco, CA 94143
Practice phone
Call (415) 353-2733
Professional email
Get professional email
Personal email
Get personal email
Mobile number
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Social profiles

Primary practice

UCSF Helen Diller Medical Center at Parnassus Heights

Hospital · San Francisco, California

See all 8 affiliations

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Dr. Mark A. Terrelonge Jr. is a neurologist in San Francisco, California

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

Dr. Terrelonge's NPI, 1366837734, was assigned on April 2, 2015. Dr. Terrelonge graduated from Stanford University School Of Medicine in 2014. Dr. Terrelonge holds California license A146489.

NPI and contact details
Medicare PAC ID
1052662780
NPI enumeration date
April 2, 2015
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
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Sex
Male
Estimated age
37
Medical school graduation
2014

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

Dr. Mark A. Terrelonge Jr. practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California

Dr. Terrelonge'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. Mark A. Terrelonge Jr. is affiliated with 3 sites of care and 5 medical groups

Dr. Terrelonge's primary practice is UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California, part of University of California Health. Dr. Terrelonge is also affiliated with Zuckerberg San Francisco General Hospital and Trauma Center. The medical group on file is UCSF Pediatrics. Dmand AI also links Dr. Terrelonge to 1 more hospital and 4 medical groups, each named with a free account.

See all 8 affiliations for Dr. Terrelonge

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

Dmand AI tracks the EHR system at Dr. Mark A. Terrelonge Jr.'s practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Terrelonge practices, 3 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
+2 more sites and 4 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

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Dr. Mark A. Terrelonge Jr. is one of 2,207 neurologists in California

Neurology is Dr. Terrelonge's primary specialty in the NPI Registry, under taxonomy code 2084N0400X. Dr. Terrelonge is board certified in neurology by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Terrelonge's licenses on file in 2 states: California and Hawaii.

Specialties and state licenses

  • Neurology, CaliforniaPrimaryLicense A146489 · 2016 to 2026 · taxonomy 2084N0400X
  • Hawaii license2020 to 2026

Clinical focus

Dmand AI lists fibromyalgia and chronic pain, hereditary polyneuropathy, lower back pain, mobility impairment, muscle disease, muscle pain, fibromyalgia, and limb pain, neck pain and spine problems and neuropathy among the conditions Dr. Terrelonge treats.

Neurologists near Dr. Terrelonge

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. Mark A. Terrelonge Jr. billed Medicare for 450 services in 2024

CMS data shows 450 Medicare services from Dr. Terrelonge across 10 procedure codes in 2024, for 137 Medicare patients. Medicare paid $26,524 for them.

Medicare services, 2024450
Medicare patients137
Paid by Medicare$26,524
Procedure codes10

Dr. Terrelonge's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 2062024: 18212%
Other services
2023: 152024: 154927%
Tests and treatments
2023: 2392024: 11452%

Where Dr. Terrelonge's Medicare services took place, 2024

  • In an office6013%
  • In a facility39087%

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

  • Dr. Terrelonge
  • California median
Medicare services
450vs 40411% above
Medicare patients
137vs 19028% below
Part D claims
276vs 32415% below

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

Dr. Terrelonge'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. Terrelonge

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Terrelonge and other neurologists in California.

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

Dr. Mark A. Terrelonge Jr. treated 137 Medicare patients in 2024, average age 70

CMS counts 137 Medicare patients who saw Dr. Terrelonge in 2024. The largest group is 65 to 74, with 55 patients. 74% of them have high cholesterol, and 67% have high blood pressure. 29% are also on Medicaid. Their average risk score is 1.70, 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. Terrelonge's median patient age at 66, with 51% women.

Medicare patients, 2024137
Average age70
Average risk score1.70
Also on Medicaid29%

Dr. Terrelonge's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Terrelonge's Medicare patients by sex, 2024

  • Women6346%
  • Men7454%

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

  1. High cholesterol74%
  2. High blood pressure67%
  3. Arthritis53%
  4. Mood disorders27%
  5. Ischemic heart disease23%
  6. Anxiety22%
  7. Depression22%
  8. Diabetes21%

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

Dr. Terrelonge's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 66

Patient panel by sex, all payers

  • Women51%
  • Men47%

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

Dr. Mark A. Terrelonge Jr. wrote 395 Medicare Part D claims in 2024

In 2024, Dr. Terrelonge wrote 395 Medicare Part D claims for 71 patients. 76% of them were for generic drugs. CMS names the drug for 276 of them, across 12 drugs with 11 or more claims each, at $920,854 in total drug cost. In 2023, CMS named 226 claims across 11 drugs.

Part D claims, 2024395
Drugs named by CMS12
Total drug cost$920,854
Part D patients71

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

  • Generic301 claims76%
  • Brand-name and other94 claims24%

Dr. Terrelonge'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. Terrelonge's Part D claims, 2024

  • Opioids3%11 of 395 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: 2262024: 27622%

Drugs named by CMS: 12 in 2024, 11 in 2023.

See all prescribing by Dr. Terrelonge

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. Mark A. Terrelonge Jr. scored 97 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Terrelonge for performance year 2024, reported as part of a group. Dr. Terrelonge accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Terrelonge as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Terrelonge's MIPS scores, performance year 2024

  • 97of 100Final score
  • 89.9of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 78of 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. Mark A. Terrelonge Jr. has 6 publications on record

Dmand AI links 6 papers to Dr. Terrelonge, published from 2022 to 2024. The most frequent topics are Delirium. Dr. Terrelonge's most frequent co-authors are Vanja Christopher Douglas, MD, Sara Lahue, MD and Laura Katherine Rosow, MD.

Papers6
Years published2022 to 2024

Dr. Terrelonge's papers by year, 2022 to 2024

Topics Dr. Terrelonge writes about most

  • Delirium

Dr. Terrelonge's most frequent co-authors

Recent publications by Dr. Terrelonge

See all 6 publications and co-authors

See who Dr. Terrelonge researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Terrelonge 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. Mark A. Terrelonge Jr. received $26 in industry payments in 2020

CMS Open Payments shows 1 general payment to Dr. Terrelonge from 1 drug or device company in 2020. Food and beverage make up the largest share, 100% of the total. Biogen, Inc. paid the most, $26.

Companies that paid Dr. Terrelonge the most, 2020 to 2020

Share is of all general payments to this clinician.

See all payments to Dr. Terrelonge

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Mark A. Terrelonge Jr. graduated from Stanford University School Of Medicine

Dr. Terrelonge graduated from Stanford University School Of Medicine in 2014.

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

Source: Dmand AI Professional Profile Data

Dr. Mark A. Terrelonge Jr. accepts plans from 6 insurance carriers

Dr. Terrelonge 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. Terrelonge accepts, by number of carriers

  1. Medicare6
  2. PPO5
  3. HMO2
  4. POS2
  5. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Mark A. Terrelonge Jr.'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
Industry paymentsOpen Payments (CMS) (opens in a new tab)
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. Mark A. Terrelonge Jr.

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. Mark A. Terrelonge Jr.'s NPI number?

Dr. Mark A. Terrelonge Jr.'s NPI number is 1366837734. It was assigned on April 2, 2015, and it is active in the NPI Registry.

What kind of doctor is Dr. Mark A. Terrelonge Jr.?

Dr. Mark A. Terrelonge Jr. is a neurologist in San Francisco, California. The primary specialty in the NPI Registry is Neurology Physician (taxonomy code 2084N0400X).

Where does Dr. Mark A. Terrelonge Jr. practice?

Dr. Terrelonge practices at 505 Parnassus Ave, Box 0296, San Francisco, CA 94143. Dr. Terrelonge'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. Terrelonge to 1 hospital and 4 medical groups.

What is Dr. Mark A. Terrelonge Jr.'s office phone number?

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

What is Dr. Mark A. Terrelonge Jr.'s medical license number?

Dr. Terrelonge holds California license A146489, one of the licenses on file in 2 states.

Which states has Dr. Mark A. Terrelonge Jr. been licensed in?

Dmand AI has state licenses on file for Dr. Terrelonge in California (2016 to 2026) and Hawaii (2020 to 2026).

Which hospitals is Dr. Mark A. Terrelonge Jr. affiliated with?

Dr. Terrelonge practices at UCSF Helen Diller Medical Center at Parnassus Heights in San Francisco, California. Dr. Terrelonge is also affiliated with Zuckerberg San Francisco General Hospital and Trauma Center. Dmand AI links Dr. Terrelonge to 1 more hospital.

What medical group is Dr. Mark A. Terrelonge Jr. part of?

Dr. Terrelonge is linked to UCSF Pediatrics. Dmand AI links Dr. Terrelonge to 4 more medical groups.

Does Dr. Mark A. Terrelonge Jr. accept Medicare?

Yes. CMS data shows Dr. Terrelonge billed Medicare for 450 services in 2024, and Dr. Terrelonge accepts Medicare assignment.

Does Dr. Mark A. Terrelonge Jr. offer telehealth?

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

Show 11 more questionsShow fewer questions

What is Dr. Mark A. Terrelonge Jr.'s MIPS score?

Dr. Terrelonge's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.

How many Medicare patients does Dr. Mark A. Terrelonge Jr. see?

CMS counts 137 Medicare patients who saw Dr. Terrelonge in 2024, with an average age of 70.

Is Dr. Mark A. Terrelonge Jr. board certified?

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

What services does Dr. Mark A. Terrelonge Jr. bill to Medicare?

In 2024, Dr. Terrelonge's most billed Medicare services were medicare service (G2211), office visit, established patient (99215) and nerve and brain test (95886).

Where did Dr. Mark A. Terrelonge Jr. go to medical school?

Dr. Terrelonge graduated from Stanford University School Of Medicine in 2014.

What drugs does Dr. Mark A. Terrelonge Jr. prescribe most?

In 2024 Medicare Part D data, Dr. Terrelonge's most prescribed drugs by claims were Pregabalin, Gabapentin and Baclofen.

Has Dr. Mark A. Terrelonge Jr. received payments from drug or device companies?

CMS Open Payments shows $26 in general payments to Dr. Terrelonge from 1 company from 2020 to 2020. The largest total came from Biogen, Inc.

How long has Dr. Mark A. Terrelonge Jr. been practicing?

Dr. Terrelonge graduated from medical school in 2014, 12 years ago.

Does Dr. Mark A. Terrelonge Jr. do research?

Dmand AI links 6 publications to Dr. Terrelonge, published from 2022 to 2024.

Who does Dr. Mark A. Terrelonge Jr. publish with?

Dr. Terrelonge's most frequent co-authors are Vanja Christopher Douglas, MD (2 shared papers), Sara Lahue, MD (2 shared papers) and Laura Katherine Rosow, MD (2 shared papers).

What insurance does Dr. Mark A. Terrelonge Jr. accept?

Dr. Terrelonge 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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