Joshua David Penfield, MBCHB

  • San Diego, CA
  • Gastroenterologist
NPI1356508402PAC ID9133266471
Medicare services, 2024
874
Medicare patients, 2024
165
Part D claims, 2024
288
Publications
4
Hospital affiliations
1
Practice address
5651 Copley Dr, San Diego, CA 92111
Practice phone
Call (858) 262-6666
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Sharp Rees-Stealy Medical Group, Inc

San Diego, California

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Joshua David Penfield is a gastroenterologist in San Diego, California

Joshua Penfield practices at Sharp Rees-Stealy Medical Group, Inc in San Diego, California.

Joshua Penfield's NPI, 1356508402, was assigned on May 16, 2008. Joshua Penfield graduated from Warwick Medical School in 2004. Joshua Penfield holds California license C170560.

NPI and contact details
Medicare PAC ID
9133266471
NPI enumeration date
May 16, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(858) 262-6666
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
48
Medical school graduation
2004

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

Joshua David Penfield practices at Sharp Rees-Stealy Medical Group, Inc in San Diego, California

Joshua Penfield's primary practice is Sharp Rees-Stealy Medical Group, Inc, at 5651 Copley Dr, San Diego, CA 92111 in San Diego County. The practice phone is (858) 262-6666.

  • Sharp Rees-Stealy Medical Group, Inc
    5651 Copley Dr, San Diego, CA 92111 · San Diego CountyPhone(858) 262-6666

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

Joshua David Penfield is affiliated with 3 sites of care and 1 medical group

Joshua Penfield's primary practice is Sharp Rees-Stealy Medical Group, Inc in San Diego, California. Joshua Penfield is also affiliated with Sharp Memorial Hospital. The medical group on file is Sharp Rees-Stealy Medical Group. Dmand AI also links Joshua Penfield to 1 more group practice or clinic, named with a free account.

See all 4 affiliations for Joshua Penfield

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

Dmand AI tracks the EHR system at Joshua David Penfield's practice

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

EHR by site
SiteEHR vendor and product
Sharp Rees-Stealy Medical Group, IncAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Joshua David Penfield is one of 1,977 gastroenterologists in California

Gastroenterology is Joshua Penfield's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Joshua Penfield is board certified in gastroenterology by the American Board of Internal Medicine. Dmand AI has Joshua Penfield's licenses on file in 5 states: California, Maine, Washington, Minnesota and Ohio.

Specialties and state licenses

  • Gastroenterology, CaliforniaPrimaryLicense C170560 · 2020 to 2026 · taxonomy 207RG0100X
  • Maine licenseSince 2014
  • Washington license2014 to 2021
  • Minnesota license2010 to 2013
  • Ohio license2006 to 2012

Clinical focus

Dmand AI lists chronic inflammatory bowel disease (IBD), cirrhosis of the liver, colonoscopy, gastroenteritis, hepatitis c, irritable bowel syndrome (IBS), pancreas or bile duct endoscopy (ERCP) and upper GI endoscopy among the conditions Joshua Penfield treats.

Gastroenterologists near Joshua Penfield

Counts of gastroenterologists 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

Joshua David Penfield billed Medicare for 874 services in 2024

CMS data shows 874 Medicare services from Joshua Penfield across 9 procedure codes in 2024, for 165 Medicare patients. Medicare paid $37,979 for them.

Medicare services, 2024874
Medicare patients165
Paid by Medicare$37,979
Procedure codes9

Joshua Penfield's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Drugs given in the office
2023: 6462024: 53717%
Tests and treatments
2023: 1622024: 11728%
Surgery
2023: 1542024: 10333%
Other services
2023: 1102024: 8622%
Office and hospital visits
2023: 342024: 319%

Where Joshua Penfield's Medicare services took place, 2024

  • In an office85097%
  • In a facility243%

Joshua Penfield compared with the California median for gastroenterologists, 2024

  • Joshua Penfield
  • California median
Medicare services
874vs 58649% above
Medicare patients
165vs 30245% below
Part D claims
151vs 38060% below

Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.

Joshua Penfield'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.

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

Joshua David Penfield treated 165 Medicare patients in 2024, average age 74

CMS counts 165 Medicare patients who saw Joshua Penfield in 2024. The largest group is 65 to 74, with 90 patients. 65% of them have high blood pressure, and 61% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.24, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Joshua Penfield's median patient age at 64, with 52% women.

Medicare patients, 2024165
Average age74
Average risk score1.24
Also on Medicaid9%

Joshua Penfield's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Joshua Penfield's Medicare patients by sex, 2024

  • Women9960%
  • Men6640%

Chronic conditions among Joshua Penfield's Medicare patients, 2024

  1. High blood pressure65%
  2. High cholesterol61%
  3. Arthritis38%
  4. Diabetes24%
  5. Chronic kidney disease20%
  6. Mood disorders20%
  7. Depression19%
  8. Heart failure18%

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

Joshua Penfield's patients across all payers

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

Patient panel by age, all payers

Median age 64

Patient panel by sex, all payers

  • Women52%
  • Men47%

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

Joshua David Penfield wrote 288 Medicare Part D claims in 2024

In 2024, Joshua Penfield wrote 288 Medicare Part D claims for 118 patients. 79% of them were for generic drugs. CMS names the drug for 151 of them, across 6 drugs with 11 or more claims each, at $21,218 in total drug cost. In 2023, CMS named 119 claims across 3 drugs.

Part D claims, 2024288
Drugs named by CMS6
Total drug cost$21,218
Part D patients118

Joshua Penfield's Part D claims by kind of drug, 2024

  • Generic227 claims79%
  • Brand-name61 claims21%

Joshua Penfield'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.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1192024: 15127%

Drugs named by CMS: 6 in 2024, 3 in 2023.

See all prescribing by Joshua Penfield

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

Joshua David Penfield ranks in the 75th percentile for colonoscopy in Medicare

Joshua Penfield accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 83 procedures of colonoscopy by Joshua Penfield, more than 75% of the clinicians it reports for that procedure.

Accepts Medicare assignment
Yes

Where Joshua Penfield ranks in Medicare procedure volume

Colonoscopy
75th percentile83 procedures
Upper gastrointestinal (GI) endoscopy for acid reflux
68th percentile64 procedures

CMS ranks each clinician against every clinician it reports for the same procedure category.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)

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Joshua David Penfield has 4 publications on record

Dmand AI links 4 papers to Joshua Penfield, published from 2012 to 2022. The most frequent topics are Esophagus. Joshua Penfield has published most often in Am J Gastroenterol. Joshua Penfield's most frequent co-authors are Cynthia Wilson Baffi, MD, Todd H. Baron, MD and Jonathan Joseph Cho, MD, PhD.

Papers4
Years published2012 to 2022

Joshua Penfield's papers by year, 2012 to 2022

Topics Joshua Penfield writes about most

  • Esophagus

Joshua Penfield's most frequent co-authors

Recent publications by Joshua Penfield

See all 4 publications and co-authors

See who Joshua Penfield researches with

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

How network discovery works

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

Joshua David Penfield received $369 in industry payments from 2016 to 2024

CMS Open Payments shows 9 general payments to Joshua Penfield from 5 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. Olympus America Inc. paid the most, $154.

General payments to Joshua Penfield by program year, 2016 to 2024

Companies that paid Joshua Penfield the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Joshua Penfield

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

Joshua David Penfield graduated from Warwick Medical School

Joshua Penfield graduated from Warwick Medical School in 2004.

  1. Medical schoolWarwick Medical School
  2. Board certified in gastroenterologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Joshua David Penfield accepts plans from 7 insurance carriers

Joshua Penfield is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

  • Aetna
  • Blue Cross Blue Shield of Michigan
  • HCSC
  • United Healthcare
  • Blue Cross and Blue Shield of Kansas City
  • CMS Medicare
  • WI State Medicaid

Plan types Joshua Penfield accepts, by number of carriers

  1. HMO3
  2. Medicare3
  3. POS3
  4. PPO3
  5. EPO2
  6. Medicaid1

Source: Dmand AI Insurance Network Data

Sources for Joshua David Penfield'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)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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 Joshua David Penfield

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Joshua David Penfield's NPI number?

Joshua David Penfield's NPI number is 1356508402. It was assigned on May 16, 2008, and it is active in the NPI Registry.

What does Joshua David Penfield specialize in?

Joshua David Penfield is a gastroenterologist in San Diego, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).

Where does Joshua David Penfield practice?

Joshua Penfield practices at 5651 Copley Dr, San Diego, CA 92111. Joshua Penfield's primary practice is Sharp Rees-Stealy Medical Group, Inc in San Diego, California. Dmand AI also links Joshua Penfield to 1 group practice or clinic.

What is Joshua David Penfield's office phone number?

The practice phone on file for Joshua Penfield is (858) 262-6666.

What is Joshua David Penfield's medical license number?

Joshua Penfield holds California license C170560, one of the licenses on file in 5 states.

Which states has Joshua David Penfield been licensed in?

Dmand AI has state licenses on file for Joshua Penfield in California (2020 to 2026), Maine (since 2014), Washington (2014 to 2021), Minnesota (2010 to 2013) and Ohio (2006 to 2012).

Which hospitals is Joshua David Penfield affiliated with?

Joshua Penfield is affiliated with Sharp Memorial Hospital.

What medical group is Joshua David Penfield part of?

Joshua Penfield is linked to Sharp Rees-Stealy Medical Group.

Does Joshua David Penfield accept Medicare?

Yes. CMS data shows Joshua Penfield billed Medicare for 874 services in 2024, and Joshua Penfield accepts Medicare assignment.

How many Medicare patients does Joshua David Penfield see?

CMS counts 165 Medicare patients who saw Joshua Penfield in 2024, with an average age of 74.

Show 9 more questionsShow fewer questions

Is Joshua David Penfield board certified?

Yes. Joshua Penfield is board certified in gastroenterology by the American Board of Internal Medicine.

What services does Joshua David Penfield bill to Medicare?

In 2024, Joshua Penfield's most billed Medicare services were injected or infused drug (J2250), special service (99153) and injected or infused drug (J3010).

Where did Joshua David Penfield go to medical school?

Joshua Penfield graduated from Warwick Medical School in 2004.

What drugs does Joshua David Penfield prescribe most?

In 2024 Medicare Part D data, Joshua Penfield's most prescribed drugs by claims were Omeprazole, Linzess and Gavilyte-G.

Has Joshua David Penfield received payments from drug or device companies?

CMS Open Payments shows $369 in general payments to Joshua Penfield from 5 companies from 2016 to 2024. The largest total came from Olympus America Inc.

How long has Joshua David Penfield been practicing?

Joshua Penfield graduated from medical school in 2004, 22 years ago.

Does Joshua David Penfield do research?

Dmand AI links 4 publications to Joshua Penfield, published from 2012 to 2022.

Who does Joshua David Penfield publish with?

Joshua Penfield's most frequent co-authors are Cynthia Wilson Baffi, MD (1 shared paper), Todd H. Baron, MD (1 shared paper) and Jonathan Joseph Cho, MD, PhD (1 shared paper).

What insurance does Joshua David Penfield accept?

Joshua Penfield is in network with 7 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.

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