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Dr. Daniel Seth Fierer, MD
- Medicare services, 2024
- 170
- Medicare patients, 2024
- 67
- Part D claims, 2024
- 2,670
- Publications
- 53
- Hospital affiliations
- 2
- Practice address
- 158 W 124th St, New York, NY 10027
- Practice phone
- Call (212) 987-3100
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Medicine Department of Mount Sinai
New York, New York
Find Dr. Fierer'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. Daniel Seth Fierer is an infectious disease specialist in New York, New York
Dr. Fierer practices at Medicine Department of Mount Sinai in New York, New York.
Dr. Fierer's NPI, 1649298472, was assigned on July 18, 2006. Dr. Fierer graduated from Yale School of Medicine in 1986. Dr. Fierer's New York license number on file is 216771.
- NPI
- 1649298472NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406816537
- NPI enumeration date
- July 18, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (212) 987-3100
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel Seth Fierer practices at Medicine Department of Mount Sinai in New York, New York
Dr. Fierer's primary practice is Medicine Department of Mount Sinai, at 158 W 124th St, New York, NY 10027 in New York County. The practice phone is (212) 987-3100.
- Medicine Department of Mount Sinai158 W 124th St, New York, NY 10027 · New York CountyPhone(212) 987-3100
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Daniel Seth Fierer is affiliated with 4 sites of care and 1 medical group
Dr. Fierer's primary practice is Medicine Department of Mount Sinai in New York, New York. Dr. Fierer is also affiliated with The Mount Sinai Hospital. The medical group on file is Mount Sinai Institute for Liver Medicine. Dmand AI also links Dr. Fierer to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Daniel Seth Fierer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fierer practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Medicine Department of Mount Sinai | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel Seth Fierer is one of 825 infectious disease specialists in New York
Infectious disease is Dr. Fierer's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Fierer is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Fierer's licenses on file in 4 states: New York, California, District of Columbia and Maryland.
Specialties and state licenses
- Infectious disease, New YorkPrimary
- California license
- District of Columbia license
- Maryland license
Clinical focus
Dmand AI lists hiv/aids and UTI among the conditions Dr. Fierer treats.
Infectious disease specialists near Dr. Fierer
Counts of infectious disease specialists 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. Daniel Seth Fierer billed Medicare for 170 services in 2024
CMS data shows 170 Medicare services from Dr. Fierer across 6 procedure codes in 2024, for 67 Medicare patients. Medicare paid $13,624 for them. Every service was in an office.
Dr. Fierer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 672024: 9643%
- Other services
- 2023: 02024: 58
- Surgery
- 2023: 132024: 1623%
Dr. Fierer compared with the New York median for infectious disease specialists, 2024
- Dr. Fierer
- New York median
- Medicare services
- 170vs 23829% below
- Medicare patients
- 67vs 13450% below
- Part D claims
- 2,250vs 16213.9 times
Medians across 791 infectious disease specialists in New York with Dmand AI profiles that report each measure.
Dr. Fierer'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. Fierer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Fierer and other infectious disease specialists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel Seth Fierer treated 67 Medicare patients in 2024, average age 69
CMS counts 67 Medicare patients who saw Dr. Fierer in 2024. The largest group is 65 to 74, with 34 patients. 72% of them have high cholesterol, and 61% have high blood pressure. 46% are also on Medicaid. Their average risk score is 1.90, 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. Fierer's median patient age at 57, with 36% women.
Dr. Fierer's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Fierer's Medicare patients by sex, 2024
- Women2537%
- Men4263%
Chronic conditions among Dr. Fierer's Medicare patients, 2024
- High cholesterol72%
- High blood pressure61%
- Arthritis51%
- Diabetes37%
- Ischemic heart disease33%
- Mood disorders33%
- Anxiety31%
- Chronic kidney disease30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fierer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women36%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Daniel Seth Fierer wrote 2,670 Medicare Part D claims in 2024
In 2024, Dr. Fierer wrote 2,670 Medicare Part D claims for 116 patients. 55% of them were for generic drugs. CMS names the drug for 2,250 of them, across 65 drugs with 11 or more claims each, at $3,110,766 in total drug cost. In 2023, CMS named 2,373 claims across 72 drugs.
Dr. Fierer's Part D claims by kind of drug, 2024
- Generic1,463 claims55%
- Brand-name1,188 claims44%
- Other19 claims1%
Dr. Fierer'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. Fierer's Part D claims, 2024
- Opioids1%25 of 2,670 claims
- Antibiotics3%77 of 2,670 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: 2,3732024: 2,2505%
Drugs named by CMS: 65 in 2024, 72 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. Daniel Seth Fierer offers telehealth to Medicare patients
Dr. Fierer accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fierer as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Daniel Seth Fierer has 53 publications on record
Dmand AI links 53 papers to Dr. Fierer, published from 2007 to 2022. 2016 was the busiest year, with 7. The most frequent topics are HIV Infections, Hepatitis C and Hepacivirus. Dr. Fierer has published most often in Clin Infect Dis. Dr. Fierer's most frequent co-authors are Douglas T. Dieterich, MD, Kristen M. Marks, MD and Raymond T. Chung, MD.
Dr. Fierer's papers by year, 2012 to 2022
Topics Dr. Fierer writes about most
- HIV Infections
- Hepatitis C
- Hepacivirus
- Antiviral Agents
- Homosexuality, Male
- Viral Load
- HIV-1
- Sexual and Gender Minorities
Dr. Fierer's most frequent co-authors
- Douglas T. Dieterich, MD7 shared papers
- Kristen M. Marks, MD6 shared papers
- Raymond T. Chung, MD4 shared papers
Recent publications by Dr. Fierer
See who Dr. Fierer researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Fierer works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Daniel Seth Fierer received $21 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Fierer from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Cumberland Pharmaceuticals, Inc. paid the most, $21.
Companies that paid Dr. Fierer the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Daniel Seth Fierer has 1 award and honors on record
Dmand AI lists 1 award for Dr. Fierer, most recently NCQA PPC-PCMH in 2014.
Awards and honors for Dr. Fierer
- 2014
- NCQA PPC-PCMH
Source: Dmand AI Professional Profile Data
Dr. Daniel Seth Fierer graduated from Yale School of Medicine
Dr. Fierer graduated from Yale School of Medicine in 1986. Dr. Fierer is a member of ACP and IDSA.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Daniel Seth Fierer accepts plans from 17 insurance carriers
Dr. Fierer is in network with 17 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- United Healthcare
- HCSC
- Aspirus Health Plan
- Blue Cross Blue Shield of Massachusetts
- Cigna
- +9 more carriersWith a free account
Plan types Dr. Fierer accepts, by number of carriers
- Medicare11
- PPO10
- HMO8
- POS5
- EPO4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Daniel Seth Fierer'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 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) |
| 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. Daniel Seth Fierer
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. Daniel Seth Fierer's NPI number?
Dr. Daniel Seth Fierer's NPI number is 1649298472. It was assigned on July 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel Seth Fierer?
Dr. Daniel Seth Fierer is an infectious disease specialist in New York, New York. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Daniel Seth Fierer practice?
Dr. Fierer practices at 158 W 124th St, New York, NY 10027. Dr. Fierer's primary practice is Medicine Department of Mount Sinai in New York, New York. Dmand AI also links Dr. Fierer to 1 hospital and 1 group practice or clinic.
What is Dr. Daniel Seth Fierer's office phone number?
The practice phone on file for Dr. Fierer is (212) 987-3100.
What is Dr. Daniel Seth Fierer's medical license number?
Dr. Fierer's New York license number on file is 216771, one of the licenses on file in 4 states.
Which states has Dr. Daniel Seth Fierer been licensed in?
Dmand AI has state licenses on file for Dr. Fierer in New York (2000 to 2025), California (since 1988), District of Columbia (1990 to 2000) and Maryland (1990 to 2000).
Which hospitals is Dr. Daniel Seth Fierer affiliated with?
Dr. Fierer is affiliated with The Mount Sinai Hospital. Dmand AI links Dr. Fierer to 1 more hospital.
What medical group is Dr. Daniel Seth Fierer part of?
Dr. Fierer is linked to Mount Sinai Institute for Liver Medicine.
Does Dr. Daniel Seth Fierer accept Medicare?
Yes. CMS data shows Dr. Fierer billed Medicare for 170 services in 2024, and Dr. Fierer accepts Medicare assignment.
Does Dr. Daniel Seth Fierer offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Fierer as offering telehealth services.
Show 10 more questionsShow fewer questions
How many Medicare patients does Dr. Daniel Seth Fierer see?
CMS counts 67 Medicare patients who saw Dr. Fierer in 2024, with an average age of 69.
Is Dr. Daniel Seth Fierer board certified?
Yes. Dr. Fierer is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Daniel Seth Fierer bill to Medicare?
In 2024, Dr. Fierer's most billed Medicare services were office visit, established patient (99215), medicare service (G2212) and office visit, established patient (99214).
Where did Dr. Daniel Seth Fierer go to medical school?
Dr. Fierer graduated from Yale School of Medicine in 1986.
What drugs does Dr. Daniel Seth Fierer prescribe most?
In 2024 Medicare Part D data, Dr. Fierer's most prescribed drugs by claims were Biktarvy, Atorvastatin Calcium and Tivicay.
Has Dr. Daniel Seth Fierer received payments from drug or device companies?
CMS Open Payments shows $21 in general payments to Dr. Fierer from 1 company from 2023 to 2023. The largest total came from Cumberland Pharmaceuticals, Inc.
How long has Dr. Daniel Seth Fierer been practicing?
Dr. Fierer graduated from medical school in 1986, 40 years ago.
Does Dr. Daniel Seth Fierer do research?
Dmand AI links 53 publications to Dr. Fierer, published from 2007 to 2022.
Who does Dr. Daniel Seth Fierer publish with?
Dr. Fierer's most frequent co-authors are Douglas T. Dieterich, MD (7 shared papers), Kristen M. Marks, MD (6 shared papers) and Raymond T. Chung, MD (4 shared papers).
What insurance does Dr. Daniel Seth Fierer accept?
Dr. Fierer is in network with 17 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.
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