Dr. Mark Evan Heslin, MD
- Medicare services, 2024
- 174
- Medicare patients, 2024
- 101
- Part D claims, 2024
- 196
- Publications
- 7
- Hospital affiliations
- 2
- Practice address
- 300 Pasteur Drive, Stanford, CA 94305
- Practice phone
- Call (650) 723-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Heslin'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. Mark Evan Heslin is an internist in Stanford, California
Dr. Heslin practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University.
Dr. Heslin's NPI, 1457935355, was assigned on May 7, 2021. Dr. Heslin graduated from Cooper Medical School of Rowan University in 2021. Dr. Heslin holds California license A196190.
- NPI
- 1457935355NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5597209601
- NPI enumeration date
- May 7, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 723-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Evan Heslin practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California
Dr. Heslin's primary practice is Stanford Hospital at 300 Pasteur Drive, at 300 Pasteur Drive, Stanford, CA 94305 in Santa Clara County. The practice phone is (650) 723-4000.
- Stanford Hospital at 300 Pasteur Drive300 Pasteur Drive, Stanford, CA 94305 · Santa Clara CountyPhone(650) 723-4000
Source: Dmand AI Affiliation Data
Dr. Mark Evan Heslin is affiliated with 2 sites of care and 2 medical groups
Dr. Heslin's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. The medical group on file is Stanford Health Care. Dmand AI also links Dr. Heslin to 1 more hospital and 1 medical group, each named with a free account. Dr. Heslin's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Evan Heslin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Heslin practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Stanford Hospital at 300 Pasteur Drive | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Stanford University and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Evan Heslin is one of 16,751 internists in California
Internal medicine is Dr. Heslin's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Heslin is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Internists near Dr. Heslin
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. Mark Evan Heslin billed Medicare for 174 services in 2024
CMS data shows 174 Medicare services from Dr. Heslin across 2 procedure codes in 2024, for 101 Medicare patients. Medicare paid $21,094 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Heslin compared with the California median for internists, 2024
- Dr. Heslin
- California median
- Medicare services
- 174vs 36152% below
- Medicare patients
- 101vs 15133% below
- Part D claims
- 31vs 42193% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Heslin'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. Heslin?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Heslin and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Evan Heslin treated 101 Medicare patients in 2024, average age 74
CMS counts 101 Medicare patients who saw Dr. Heslin in 2024. The largest group is 65 to 74, with 33 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 50% are also on Medicaid. Their average risk score is 2.44, 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. Heslin's median patient age at 60, with 52% women.
Dr. Heslin's Medicare patients by age, 2024
Dr. Heslin's Medicare patients by sex, 2024
- Women5554%
- Men4646%
Chronic conditions among Dr. Heslin's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Mood disorders57%
- Depression50%
- Chronic kidney disease49%
- Anxiety48%
- Arthritis45%
- Ischemic heart disease43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Heslin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women52%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Evan Heslin wrote 196 Medicare Part D claims in 2024
In 2024, Dr. Heslin wrote 196 Medicare Part D claims for 56 patients. 88% of them were for generic drugs. CMS names the drug for 31 of them, across 2 drugs with 11 or more claims each, at $256 in total drug cost. In 2023, CMS named 110 claims across 6 drugs.
Dr. Heslin's Part D claims by kind of drug, 2024
- Generic172 claims88%
- Brand-name24 claims12%
Dr. Heslin'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. Heslin's Part D claims, 2024
- Antibiotics7%13 of 196 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: 1102024: 3172%
Drugs named by CMS: 2 in 2024, 6 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
How Dr. Mark Evan Heslin takes part in Medicare
Dr. Heslin accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Mark Evan Heslin has 7 publications on record
Dmand AI links 7 papers to Dr. Heslin, published from 2020 to 2024. 2021 was the busiest year, with 3. The most frequent topics are COVID-19, Stroke and New Jersey. Dr. Heslin has published most often in J Stroke Cerebrovasc Dis. Dr. Heslin's most frequent co-authors are Jesse Mitrani Thon, MD, Pratit D. Patel, MD and Ryna Then, MD.
Dr. Heslin's papers by year, 2020 to 2024
Topics Dr. Heslin writes about most
- COVID-19
- Stroke
- New Jersey
- Patient Transfer
- SARS-CoV-2
Dr. Heslin's most frequent co-authors
Recent publications by Dr. Heslin
J Stroke Cerebrovasc Dis
See who Dr. Heslin researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Heslin 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. Mark Evan Heslin graduated from Cooper Medical School of Rowan University
Dr. Heslin graduated from Cooper Medical School of Rowan University in 2021.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Evan Heslin'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 |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Mark Evan Heslin
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 Evan Heslin's NPI number?
Dr. Mark Evan Heslin's NPI number is 1457935355. It was assigned on May 7, 2021, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Evan Heslin?
Dr. Mark Evan Heslin is an internist in Stanford, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mark Evan Heslin practice?
Dr. Heslin practices at 300 Pasteur Drive, Stanford, CA 94305. Dr. Heslin's primary practice is Stanford Hospital at 300 Pasteur Drive in Stanford, California, part of Stanford University. Dmand AI also links Dr. Heslin to 1 hospital and 1 medical group.
What is Dr. Mark Evan Heslin's office phone number?
The practice phone on file for Dr. Heslin is (650) 723-4000.
What is Dr. Mark Evan Heslin's medical license number?
Dr. Heslin holds California license A196190.
Which hospitals is Dr. Mark Evan Heslin affiliated with?
Dr. Heslin practices at Stanford Hospital at 300 Pasteur Drive in Stanford, California. Dmand AI links Dr. Heslin to 1 more hospital.
What medical group is Dr. Mark Evan Heslin part of?
Dr. Heslin is linked to Stanford Health Care. Dmand AI links Dr. Heslin to 1 more medical group.
Does Dr. Mark Evan Heslin accept Medicare?
Yes. CMS data shows Dr. Heslin billed Medicare for 174 services in 2024, and Dr. Heslin accepts Medicare assignment.
How many Medicare patients does Dr. Mark Evan Heslin see?
CMS counts 101 Medicare patients who saw Dr. Heslin in 2024, with an average age of 74.
What services does Dr. Mark Evan Heslin bill to Medicare?
In 2024, Dr. Heslin's most billed Medicare services were hospital inpatient care (99233) and hospital inpatient care (99223).
Show 5 more questionsShow fewer questions
Where did Dr. Mark Evan Heslin go to medical school?
Dr. Heslin graduated from Cooper Medical School of Rowan University in 2021.
What drugs does Dr. Mark Evan Heslin prescribe most?
In 2024 Medicare Part D data, Dr. Heslin's most prescribed drugs by claims were Gabapentin and Atorvastatin Calcium.
How long has Dr. Mark Evan Heslin been practicing?
Dr. Heslin graduated from medical school in 2021, 5 years ago.
Does Dr. Mark Evan Heslin do research?
Dmand AI links 7 publications to Dr. Heslin, published from 2020 to 2024.
Who does Dr. Mark Evan Heslin publish with?
Dr. Heslin's most frequent co-authors are Jesse Mitrani Thon, MD (5 shared papers), Pratit D. Patel, MD (2 shared papers) and Ryna Then, MD (2 shared papers).
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card