Dr. Jeffrey T. Darnall, MD

  • Chester, PA
  • Internist
NPI1487705430
Medicare services, 2024
96
Medicare patients, 2024
79
Part D claims, 2024
717
Industry payments
$7,994
Affiliated sites
2
Practice address
1 Medical Center Blvd, Chester, PA 19013
Practice phone
Call (610) 447-2000
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Crozer Chester Medical Center (CLOSED)

Chester, Pennsylvania

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Dr. Jeffrey T. Darnall is an internist in Chester, Pennsylvania

Dr. Darnall practices at Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania.

Dr. Darnall's NPI, 1487705430, was assigned on January 16, 2007. Dr. Darnall graduated from Vanderbilt University School Of Medicine in 1976. Dr. Darnall holds Pennsylvania license MD019879E.

NPI and contact details
NPI enumeration date
January 16, 2007
NPI status
Active
Practice phone
(610) 447-2000
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
76
Medical school graduation
1976

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data

Dr. Jeffrey T. Darnall practices at Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania

Dr. Darnall's primary practice is Crozer Chester Medical Center (CLOSED), at 1 Medical Center Blvd, Chester, PA 19013 in Delaware County. The practice phone is (610) 447-2000.

  • Crozer Chester Medical Center (CLOSED)
    1 Medical Center Blvd, Chester, PA 19013 · Delaware CountyPhone(610) 447-2000

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Jeffrey T. Darnall is affiliated with 3 sites of care and 2 medical groups

Dr. Darnall's primary practice is Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania. The medical group on file is Crozer Health Medical Group (CHMG). Dmand AI also links Dr. Darnall to 2 more group practices and clinics and 1 medical group, each named with a free account.

See all 5 affiliations for Dr. Darnall

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Jeffrey T. Darnall's practice

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

EHR by site
SiteEHR vendor and product
Crozer Chester Medical Center (CLOSED)Available with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Jeffrey T. Darnall is one of 5,665 internists in Pennsylvania

Internal medicine is Dr. Darnall's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Darnall is board certified in infectious disease by the American Board of Internal Medicine. Dmand AI has Dr. Darnall's licenses on file in 2 states: Pennsylvania and North Carolina.

Specialties and state licenses

  • Internal medicine, PennsylvaniaPrimaryLicense MD019879E · 1977 to 2026 · taxonomy 207R00000X
  • North Carolina license1979 to 1982

Clinical focus

Dmand AI lists acute skin infection, cold sores or genital herpes, hiv/aids, joint or bone infection, lymphedema, pneumonia, UTI and varicose veins among the conditions Dr. Darnall treats.

Internists near Dr. Darnall

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. Jeffrey T. Darnall billed Medicare for 96 services in 2024

CMS data shows 96 Medicare services from Dr. Darnall across 2 procedure codes in 2024, all of them office visits, for 79 Medicare patients. Medicare paid $8,329 for them. Every service was in an office.

Medicare services, 202496
Medicare patients79
Paid by Medicare$8,329
Procedure codes2

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

  • 2023
  • 2024
Office and hospital visits
2023: 832024: 9616%

Dr. Darnall compared with the Pennsylvania median for internists, 2024

  • Dr. Darnall
  • Pennsylvania median
Medicare services
96vs 41777% below
Medicare patients
79vs 18557% below
Part D claims
543vs 2242.4 times

Medians across 5,518 internists in Pennsylvania with Dmand AI profiles that report each measure.

Dr. Darnall'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. Darnall

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

Dr. Jeffrey T. Darnall treated 79 Medicare patients in 2024, average age 72

CMS counts 79 Medicare patients who saw Dr. Darnall in 2024. The largest group is 65 to 74, with 39 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 38% are also on Medicaid. Their average risk score is 3.00, 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. Darnall's median patient age at 67, with 42% women.

Medicare patients, 202479
Average age72
Average risk score3.00
Also on Medicaid38%

Dr. Darnall's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Darnall's Medicare patients by sex, 2024

  • Women4152%
  • Men3848%

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis63%
  4. Diabetes52%
  5. Chronic kidney disease46%
  6. Ischemic heart disease46%
  7. Atrial fibrillation44%
  8. Mood disorders44%

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

Dr. Darnall's patients across all payers

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

Patient panel by age, all payers

Median age 67

Patient panel by sex, all payers

  • Women42%
  • Men58%

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

Dr. Jeffrey T. Darnall wrote 717 Medicare Part D claims in 2024

In 2024, Dr. Darnall wrote 717 Medicare Part D claims for 93 patients. 54% of them were for generic drugs. CMS names the drug for 543 of them, across 22 drugs with 11 or more claims each, at $1,081,018 in total drug cost. In 2023, CMS named 523 claims across 26 drugs.

Part D claims, 2024717
Drugs named by CMS22
Total drug cost$1.1M
Part D patients93

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

  • Generic390 claims54%
  • Brand-name and other327 claims46%

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

  • Antibiotics29%206 of 717 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: 5232024: 5434%

Drugs named by CMS: 22 in 2024, 26 in 2023.

See all prescribing by Dr. Darnall

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

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Dr. Jeffrey T. Darnall received $7,994 in industry payments from 2016 to 2025

CMS Open Payments shows 460 general payments to Dr. Darnall from 34 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Novo Nordisk Inc paid the most, $1,414.

General payments to Dr. Darnall by program year, 2016 to 2025

General payments to Dr. Darnall by kind, 2016 to 2025

$8Kin total
  • Food and beverage$7,65296%
  • Education$2824%
  • Speaker and faculty fees$601%

Companies that paid Dr. Darnall the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Darnall

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

Dr. Jeffrey T. Darnall has 4 awards and honors on record

Dmand AI lists 4 awards for Dr. Darnall, most recently Checkbook Top Doc in 2014.

Awards and honors for Dr. Darnall

  1. 2014
    • Checkbook Top Doc
    • NCQA PCMH
  2. 2013
    • NCQA PPC
  3. Undated
    • CMS Stage 1 2012

Source: Dmand AI Professional Profile Data

Dr. Jeffrey T. Darnall graduated from Vanderbilt University School Of Medicine

Dr. Darnall graduated from Vanderbilt University School Of Medicine in 1976. Dr. Darnall is a member of ACP.

  1. Medical schoolVanderbilt University School Of Medicine
  2. Board certified in infectious diseaseAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Jeffrey T. Darnall accepts plans from 15 insurance carriers

Dr. Darnall is in network with 15 carriers, including Aetna, Highmark and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

Plan types Dr. Darnall accepts, by number of carriers

  1. PPO10
  2. Medicare9
  3. POS6
  4. HMO5
  5. EPO4
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Dr. Jeffrey T. Darnall'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 phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)
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. Jeffrey T. Darnall

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. Jeffrey T. Darnall's NPI number?

Dr. Jeffrey T. Darnall's NPI number is 1487705430. It was assigned on January 16, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Jeffrey T. Darnall?

Dr. Jeffrey T. Darnall is an internist in Chester, Pennsylvania. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Jeffrey T. Darnall practice?

Dr. Darnall practices at 1 Medical Center Blvd, Chester, PA 19013. Dr. Darnall's primary practice is Crozer Chester Medical Center (CLOSED) in Chester, Pennsylvania. Dmand AI also links Dr. Darnall to 2 group practices and clinics and 1 medical group.

What is Dr. Jeffrey T. Darnall's office phone number?

The practice phone on file for Dr. Darnall is (610) 447-2000.

What is Dr. Jeffrey T. Darnall's medical license number?

Dr. Darnall holds Pennsylvania license MD019879E, one of the licenses on file in 2 states.

Which states has Dr. Jeffrey T. Darnall been licensed in?

Dmand AI has state licenses on file for Dr. Darnall in Pennsylvania (1977 to 2026) and North Carolina (1979 to 1982).

What medical group is Dr. Jeffrey T. Darnall part of?

Dr. Darnall is linked to Crozer Health Medical Group (CHMG). Dmand AI links Dr. Darnall to 1 more medical group.

Does Dr. Jeffrey T. Darnall accept Medicare?

Yes. CMS data shows Dr. Darnall billed Medicare for 96 services in 2024.

How many Medicare patients does Dr. Jeffrey T. Darnall see?

CMS counts 79 Medicare patients who saw Dr. Darnall in 2024, with an average age of 72.

Is Dr. Jeffrey T. Darnall board certified?

Yes. Dr. Darnall is board certified in infectious disease by the American Board of Internal Medicine.

Show 6 more questionsShow fewer questions

What services does Dr. Jeffrey T. Darnall bill to Medicare?

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

Where did Dr. Jeffrey T. Darnall go to medical school?

Dr. Darnall graduated from Vanderbilt University School Of Medicine in 1976.

What drugs does Dr. Jeffrey T. Darnall prescribe most?

In 2024 Medicare Part D data, Dr. Darnall's most prescribed drugs by claims were Biktarvy, Doxycycline Hyclate and Tivicay.

Has Dr. Jeffrey T. Darnall received payments from drug or device companies?

CMS Open Payments shows $7,994 in general payments to Dr. Darnall from 34 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.

How long has Dr. Jeffrey T. Darnall been practicing?

Dr. Darnall graduated from medical school in 1976, 50 years ago.

What insurance does Dr. Jeffrey T. Darnall accept?

Dr. Darnall is in network with 15 carriers, including Aetna, Highmark and United Healthcare. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.

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