Am J Gastroenterol
Joshua David Penfield, MBCHB
- 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
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sharp Rees-Stealy Medical Group, Inc
San Diego, California
Find Joshua Penfield'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.
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
- 1356508402NPI Registry (opens in a new tab)
- 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
- Get email
- Mobile number
- Get number
- 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, Inc5651 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.
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.
| Site | EHR vendor and product |
|---|---|
| Sharp Rees-Stealy Medical Group, Inc | Available with a free account |
| +2 more affiliated sites | Available 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, CaliforniaPrimary
- Maine license
- Washington license
- Minnesota license
- Ohio license
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.
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.
Need commercial claims for Joshua Penfield?
Medicare shows one payer. Book a meeting to get commercial claims data for Joshua Penfield and other gastroenterologists in California.
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.
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
- High blood pressure65%
- High cholesterol61%
- Arthritis38%
- Diabetes24%
- Chronic kidney disease20%
- Mood disorders20%
- Depression19%
- 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.
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.
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.
Joshua Penfield's papers by year, 2012 to 2022
Topics Joshua Penfield writes about most
- Esophagus
Joshua Penfield's most frequent co-authors
- Cynthia Wilson Baffi, MD1 shared paper
- Todd H. Baron, MD1 shared paper
- Jonathan Joseph Cho, MD, PhD1 shared paper
Recent publications by Joshua Penfield
Gastrointest Endosc
Gastrointest Endosc
Am J Gastroenterol
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.
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.
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.
- Medical school
- Board certified in gastroenterology
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
- HMO3
- Medicare3
- POS3
- PPO3
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Joshua David Penfield'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)Doctors and Clinicians Utilization Data (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) |
| 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 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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