Dr. Frederick M. Fellin, MD

  • Philadelphia, PA
  • Hematologist and oncologist
NPI1679684476PAC ID5890811848
Medicare services, 2024
624
Medicare patients, 2024
294
Part D claims, 2024
757
Publications
13
Clinical trials
4
Practice address
111 South 11th Street, Philadelphia, PA 19107
Practice phone
Call (215) 955-6000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Thomas Jefferson University Hospital

Hospital · Philadelphia, Pennsylvania

See all 9 affiliations

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Dr. Frederick M. Fellin is a hematologist and oncologist in Philadelphia, Pennsylvania

Dr. Fellin practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University.

Dr. Fellin's NPI, 1679684476, was assigned on August 31, 2006. Dr. Fellin graduated from Sidney Kimmel Medical College in 1979. Dr. Fellin holds Pennsylvania license MD025210E.

NPI and contact details
Medicare PAC ID
5890811848
NPI enumeration date
August 31, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(215) 955-6000
Professional email
Get email
Personal email
Get email
Mobile number
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Sex
Male
Estimated age
73
Medical school graduation
1979

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

Dr. Frederick M. Fellin practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania

Dr. Fellin's primary practice is Thomas Jefferson University Hospital, at 111 South 11th Street, Philadelphia, PA 19107 in Philadelphia County. The practice phone is (215) 955-6000.

Source: Dmand AI Affiliation Data

Dr. Frederick M. Fellin is affiliated with 6 sites of care and 3 medical groups

Dr. Fellin's primary practice is Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. Dr. Fellin is also affiliated with Jefferson Abington Hospital. The medical group on file is Jefferson University Physicians. Dmand AI also links Dr. Fellin to 2 more hospitals, 2 group practices and clinics and 2 medical groups, each named with a free account.

See all 9 affiliations for Dr. Fellin

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

Dmand AI tracks the EHR system at Dr. Frederick M. Fellin's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fellin practices, 6 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Thomas Jefferson University HospitalAvailable with a free account
+5 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Frederick M. Fellin is one of 645 hematologists and oncologists in Pennsylvania

Hematology and oncology is Dr. Fellin's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Fellin is board certified in hematology by the American Board of Internal Medicine. Dmand AI has Dr. Fellin's licenses on file in 3 states: Pennsylvania, Delaware and New Jersey.

Specialties and state licenses

  • Hematology and oncology, PennsylvaniaPrimaryLicense MD025210E · 1981 to 2026 · taxonomy 207RH0003X
  • Delaware license2017 to 2025
  • New Jersey license2017 to 2023

Clinical focus

Dmand AI lists breast cancer, chronic anemia, chronic embolism thrombosis, chronic leukemia, colorectal cancer, immune deficiency disease, lung cancer and lymphoma among the conditions Dr. Fellin treats.

Hematologists and oncologists near Dr. Fellin

Counts of hematologists and oncologists 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. Frederick M. Fellin billed Medicare for 624 services in 2024

CMS data shows 624 Medicare services from Dr. Fellin across 10 procedure codes in 2024, for 294 Medicare patients. Medicare paid $44,327 for them.

Medicare services, 2024624
Medicare patients294
Paid by Medicare$44,327
Procedure codes10

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

  • 2023
  • 2024
Office and hospital visits
2023: 6762024: 54819%
Other services
2023: 02024: 76

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

  • In an office52684%
  • In a facility9816%

Dr. Fellin compared with the Pennsylvania median for hematologists and oncologists, 2024

  • Dr. Fellin
  • Pennsylvania median
Medicare services
624vs 654Close to median
Medicare patients
294vs 22730% above
Part D claims
588vs 39350% above

Medians across 600 hematologists and oncologists in Pennsylvania with Dmand AI profiles that report each measure.

Dr. Fellin'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. Fellin

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

Dr. Frederick M. Fellin treated 294 Medicare patients in 2024, average age 75

CMS counts 294 Medicare patients who saw Dr. Fellin in 2024. The largest group is 65 to 74, with 128 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.92, 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. Fellin's median patient age at 73, with 70% women.

Medicare patients, 2024294
Average age75
Average risk score1.92
Also on Medicaid9%

Dr. Fellin's Medicare patients by age, 2024

Dr. Fellin's Medicare patients by sex, 2024

  • Women19366%
  • Men10134%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Cancer55%
  4. Arthritis51%
  5. Chronic kidney disease36%
  6. Ischemic heart disease32%
  7. Diabetes30%
  8. Anxiety28%

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

Dr. Fellin's patients across all payers

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

Patient panel by age, all payers

Median age 73

Patient panel by sex, all payers

  • Women70%
  • Men29%

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

Dr. Frederick M. Fellin wrote 757 Medicare Part D claims in 2024

In 2024, Dr. Fellin wrote 757 Medicare Part D claims for 168 patients. 68% of them were for generic drugs. CMS names the drug for 588 of them, across 20 drugs with 11 or more claims each, at $3,164,350 in total drug cost. In 2023, CMS named 649 claims across 22 drugs.

Part D claims, 2024757
Drugs named by CMS20
Total drug cost$3.2M
Part D patients168

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

  • Generic513 claims68%
  • Brand-name244 claims32%

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

  • Opioids6%45 of 757 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: 6492024: 5889%

Drugs named by CMS: 20 in 2024, 22 in 2023.

See all prescribing by Dr. Fellin

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. Frederick M. Fellin offers telehealth to Medicare patients

Dr. Fellin accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fellin as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Dr. Frederick M. Fellin has 13 publications on record

Dmand AI links 13 papers to Dr. Fellin, published from 2018 to 2022. The most frequent topics are Breast Neoplasms, Liver and Rabbits. Dr. Fellin has published most often in J Biol Chem. Dr. Fellin's most frequent co-authors are Maysa M. Abu-Khalaf, MD, Rebecca Jaslow, MD and Saveri Bhattacharya, DO.

Papers13
Years published2018 to 2022

Dr. Fellin's papers by year, 2018 to 2022

Topics Dr. Fellin writes about most

  • Breast Neoplasms
  • Liver
  • Rabbits
  • Calcium
  • Cost-Benefit Analysis
  • Edetic Acid
  • Fibrinogen
  • Fibronectins

Dr. Fellin's most frequent co-authors

Recent publications by Dr. Fellin

See all 13 publications and co-authors

See who Dr. Fellin researches with

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

How network discovery works

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

Dr. Frederick M. Fellin has worked on 4 clinical trials

Dmand AI links Dr. Fellin to 4 clinical trials, 2 of them phase 2 studies. Conditions studied include Breast Neoplasms, Breast Neoplasms, Male and Triple Negative Breast Neoplasms. Sidney Kimmel Cancer Center at Thomas Jefferson University sponsors the most, 2.

Clinical trials with Dr. Fellin by phase

  1. NonePhase 1: no trials
  2. 1Phase 1/2: 1 trial
  3. 2Phase 2: 2 trials
  4. NonePhase 3: no trials
  5. NonePhase 4: no trials

Conditions in Dr. Fellin's trials

  • Breast Neoplasms
  • Breast Neoplasms, Male
  • Triple Negative Breast Neoplasms
  • Inflammatory Breast Neoplasms

Investigators on the most trials with Dr. Fellin

Recent clinical trials with Dr. Fellin

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Frederick M. Fellin received $128 in industry payments from 2017 to 2023

CMS Open Payments shows 4 general payments to Dr. Fellin from 3 drug and device companies from 2017 to 2023. Food and beverage make up the largest share, 91% of the total. Kite Pharma, Inc. paid the most, $66.

General payments to Dr. Fellin by program year, 2017 to 2023

General payments to Dr. Fellin by kind, 2017 to 2023

$128in total
  • Food and beverage$11691%
  • Education$129%

Companies that paid Dr. Fellin the most, 2017 to 2023

Share is of all general payments to this clinician.

See all payments to Dr. Fellin

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

Dr. Frederick M. Fellin has 4 awards and honors on record

Dmand AI lists 4 awards for Dr. Fellin, most recently NCQA PCSP in 2017.

Awards and honors for Dr. Fellin

  1. 2017
    • NCQA PCSP
  2. 2014
    • Super Doc
  3. Undated
    • Checkbook Top Doc
    • CMS Stage 1 EHR

Source: Dmand AI Professional Profile Data

Dr. Frederick M. Fellin graduated from Sidney Kimmel Medical College

Dr. Fellin graduated from Sidney Kimmel Medical College in 1979. Dr. Fellin is a member of ACP, AMA, ASCO and ASH.

  1. Medical schoolSidney Kimmel Medical College
  2. Board certified in hematologyAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine
  4. Board certified in medical oncologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Frederick M. Fellin accepts plans from 15 insurance carriers

Dr. Fellin is in network with 15 carriers, including Aetna, Highmark and United Healthcare. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.

Plan types Dr. Fellin accepts, by number of carriers

  1. Medicare11
  2. PPO9
  3. HMO7
  4. POS3
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Frederick M. Fellin'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)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
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. Frederick M. Fellin

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. Frederick M. Fellin's NPI number?

Dr. Frederick M. Fellin's NPI number is 1679684476. It was assigned on August 31, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Frederick M. Fellin?

Dr. Frederick M. Fellin is a hematologist and oncologist in Philadelphia, Pennsylvania. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).

Where does Dr. Frederick M. Fellin practice?

Dr. Fellin practices at 111 South 11th Street, Philadelphia, PA 19107. Dr. Fellin's primary practice is Thomas Jefferson University Hospital in Philadelphia, Pennsylvania, part of Thomas Jefferson University. Dmand AI also links Dr. Fellin to 2 hospitals, 2 group practices and clinics and 2 medical groups.

What is Dr. Frederick M. Fellin's office phone number?

The practice phone on file for Dr. Fellin is (215) 955-6000.

What is Dr. Frederick M. Fellin's medical license number?

Dr. Fellin holds Pennsylvania license MD025210E, one of the licenses on file in 3 states.

Which states has Dr. Frederick M. Fellin been licensed in?

Dmand AI has state licenses on file for Dr. Fellin in Pennsylvania (1981 to 2026), Delaware (2017 to 2025) and New Jersey (2017 to 2023).

Which hospitals is Dr. Frederick M. Fellin affiliated with?

Dr. Fellin practices at Thomas Jefferson University Hospital in Philadelphia, Pennsylvania. Dr. Fellin is also affiliated with Jefferson Abington Hospital. Dmand AI links Dr. Fellin to 2 more hospitals.

What medical group is Dr. Frederick M. Fellin part of?

Dr. Fellin is linked to Jefferson University Physicians. Dmand AI links Dr. Fellin to 2 more medical groups.

Does Dr. Frederick M. Fellin accept Medicare?

Yes. CMS data shows Dr. Fellin billed Medicare for 624 services in 2024, and Dr. Fellin accepts Medicare assignment.

Does Dr. Frederick M. Fellin offer telehealth?

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

Show 10 more questionsShow fewer questions

How many Medicare patients does Dr. Frederick M. Fellin see?

CMS counts 294 Medicare patients who saw Dr. Fellin in 2024, with an average age of 75.

Is Dr. Frederick M. Fellin board certified?

Yes. Dr. Fellin is board certified in hematology by the American Board of Internal Medicine.

What services does Dr. Frederick M. Fellin bill to Medicare?

In 2024, Dr. Fellin's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99215) and office visit, established patient (99213).

Where did Dr. Frederick M. Fellin go to medical school?

Dr. Fellin graduated from Sidney Kimmel Medical College in 1979.

What drugs does Dr. Frederick M. Fellin prescribe most?

In 2024 Medicare Part D data, Dr. Fellin's most prescribed drugs by claims were Anastrozole, Ibrance and Tamoxifen Citrate.

Has Dr. Frederick M. Fellin received payments from drug or device companies?

CMS Open Payments shows $128 in general payments to Dr. Fellin from 3 companies from 2017 to 2023. The largest total came from Kite Pharma, Inc.

How long has Dr. Frederick M. Fellin been practicing?

Dr. Fellin graduated from medical school in 1979, 47 years ago.

Does Dr. Frederick M. Fellin do research?

Dmand AI links 13 publications to Dr. Fellin, published from 2018 to 2022. Dr. Fellin has worked on 4 clinical trials.

Who does Dr. Frederick M. Fellin publish with?

Dr. Fellin's most frequent co-authors are Maysa M. Abu-Khalaf, MD (3 shared papers), Rebecca Jaslow, MD (3 shared papers) and Saveri Bhattacharya, DO (2 shared papers).

What insurance does Dr. Frederick M. Fellin accept?

Dr. Fellin is in network with 15 carriers, including Aetna, Highmark and United Healthcare. Medicare plans come from the most carriers, 11. Check the plan with the practice before a visit.

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