Dr. Hanlon B. Jen, MD
- Part D claims, 2024
- 143
- Hospital affiliations
- 1
- Medical group
- 1
- Insurance carriers
- 2
- State license
- 1
- Practice address
- 39400 Paseo Padre Pkwy, Fremont, CA 94538
- Practice phone
- Call (510) 784-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Jen's professional email, personal email and mobile number
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Dr. Hanlon B. Jen is a general surgeon in Fremont, California
Dr. Jen practices at Fremont Medical Center in Fremont, California, part of Kaiser Permanente.
Dr. Jen's NPI, 1891870556, was assigned on October 25, 2006. Dr. Jen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996. Dr. Jen holds California license A65574.
- NPI
- 1891870556NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234310392
- NPI enumeration date
- October 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 784-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Hanlon B. Jen practices at Fremont Medical Center in Fremont, California
Dr. Jen's primary practice is Fremont Medical Center, at 39400 Paseo Padre Pkwy, Fremont, CA 94538 in Alameda County. The practice phone is (510) 784-4000.
- Fremont Medical Center39400 Paseo Padre Pkwy, Fremont, CA 94538 · Alameda CountyPhone(510) 784-4000
Source: Dmand AI Affiliation Data
Dr. Hanlon B. Jen is affiliated with 1 site of care and 1 medical group
Dr. Jen's primary practice is Fremont Medical Center in Fremont, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Hanlon B. Jen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Jen practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fremont Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Hanlon B. Jen is one of 2,926 general surgeons in California
Surgery is Dr. Jen's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Jen is board certified in surgery by the American Board of Surgery. Dr. Jen is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists abdominal hernia repair surgery among the conditions Dr. Jen treats.
General surgeons near Dr. Jen
Counts of general surgeons 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. Hanlon B. Jen's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Jen's median patient age at 59, with 53% women.
Dr. Jen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Hanlon B. Jen wrote 143 Medicare Part D claims in 2024
In 2024, Dr. Jen wrote 143 Medicare Part D claims for 80 patients. 99% of them were for generic drugs. CMS names the drug for 98 of them, across 2 drugs with 11 or more claims each, at $814 in total drug cost. In 2023, CMS named 88 claims across 2 drugs.
Dr. Jen's Part D claims by kind of drug, 2024
- Generic142 claims99%
- Brand-name and other1 claims1%
Dr. Jen'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. Jen's Part D claims, 2024
- Opioids45%64 of 143 claims
- Antibiotics13%19 of 143 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: 882024: 9811%
Drugs named by CMS: 2 in 2024, 2 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
How Dr. Hanlon B. Jen takes part in Medicare
Dr. Jen accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Hanlon B. Jen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science
Dr. Jen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Hanlon B. Jen accepts plans from 2 insurance carriers
Dr. Jen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Jen accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Hanlon B. Jen'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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. Hanlon B. Jen
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. Hanlon B. Jen's NPI number?
Dr. Hanlon B. Jen's NPI number is 1891870556. It was assigned on October 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Hanlon B. Jen?
Dr. Hanlon B. Jen is a general surgeon in Fremont, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Hanlon B. Jen practice?
Dr. Jen practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. Dr. Jen's primary practice is Fremont Medical Center in Fremont, California, part of Kaiser Permanente.
What is Dr. Hanlon B. Jen's office phone number?
The practice phone on file for Dr. Jen is (510) 784-4000.
What is Dr. Hanlon B. Jen's medical license number?
Dr. Jen holds California license A65574.
Which hospitals is Dr. Hanlon B. Jen affiliated with?
Dr. Jen practices at Fremont Medical Center in Fremont, California.
What medical group is Dr. Hanlon B. Jen part of?
Dr. Jen is linked to The Permanente Medical Group, Inc.
Does Dr. Hanlon B. Jen accept Medicare?
Yes. CMS lists Dr. Jen as accepting Medicare assignment.
Is Dr. Hanlon B. Jen board certified?
Yes. Dr. Jen is board certified in surgery by the American Board of Surgery.
Where did Dr. Hanlon B. Jen go to medical school?
Dr. Jen graduated from Chicago Medical School at Rosalind Franklin University of Medicine and Science in 1996.
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What drugs does Dr. Hanlon B. Jen prescribe most?
In 2024 Medicare Part D data, Dr. Jen's most prescribed drugs by claims were Oxycodone HCl and Ibuprofen.
How long has Dr. Hanlon B. Jen been practicing?
Dr. Jen graduated from medical school in 1996, 30 years ago.
What insurance does Dr. Hanlon B. Jen accept?
Dr. Jen is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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