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Daniel James Chrobak
NPI1053638106
- Medicare services, 2023
- 44
- Part D claims, 2024
- 43
- Publications
- 1
- Hospital affiliations
- 1
- State license
- 1
- Practice address
- 350 Hawthorne Avenue, Oakland, CA 94609
- Practice phone
- Call (510) 655-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Daniel James Chrobak is an internist in Oakland, California
Daniel Chrobak practices at Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health.
Daniel Chrobak's NPI, 1053638106, was assigned on April 29, 2010. Daniel Chrobak graduated from UCSF School of Medicine in 2010. Daniel Chrobak holds California license A119356.
NPI and contact details
- NPI
- 1053638106NPI Registry (opens in a new tab)
- NPI enumeration date
- April 29, 2010
- NPI status
- Active
- Practice phone
- (510) 655-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Daniel James Chrobak practices at Alta Bates Summit Medical Center in Oakland, California
Daniel Chrobak's primary practice is Alta Bates Summit Medical Center, at 350 Hawthorne Avenue, Oakland, CA 94609 in Alameda County. The practice phone is (510) 655-4000.
- Alta Bates Summit Medical Center350 Hawthorne Avenue, Oakland, CA 94609 · Alameda CountyPhone(510) 655-4000
Source: Dmand AI Affiliation Data
Daniel James Chrobak is affiliated with 1 site of care
Daniel Chrobak's primary practice is Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Daniel James Chrobak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Daniel Chrobak practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alta Bates Summit Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Daniel James Chrobak is one of 16,751 internists in California
Internal medicine is Daniel Chrobak's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Daniel Chrobak is board certified in internal medicine by the American Board of Internal Medicine. Daniel Chrobak is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists sepsis among the conditions Daniel Chrobak treats.
Internists near Daniel Chrobak
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
16,751internists in California273internists in Oakland23internists at Alta Bates Summit Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Daniel James Chrobak billed Medicare for 44 services in 2023
CMS data shows 44 Medicare services from Daniel Chrobak across 1 procedure code in 2023. Medicare paid $6,435 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202344
Paid by Medicare$6,435
Procedure codes1
Daniel Chrobak's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 902023: 4451%
- Surgery
- 2022: 192023: 0100%
Daniel Chrobak compared with the California median for internists, 2023
- Daniel Chrobak
- California median
- Medicare services
- 44vs 36188% below
- Part D claims
- 11vs 42197% below
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Daniel Chrobak's most billed Medicare procedure codes, 2023
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 Daniel Chrobak?
Medicare shows one payer. Book a meeting to get commercial claims data for Daniel Chrobak and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Daniel James Chrobak's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Daniel Chrobak's median patient age at 56, with 48% women.
Daniel Chrobak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women48%
- Men51%
Source: Dmand AI Patient Panel Data
Daniel James Chrobak wrote 43 Medicare Part D claims in 2024
In 2024, Daniel Chrobak wrote 43 Medicare Part D claims. 65% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $90,327 in total drug cost. In 2016, CMS named 11 claims across 1 drug.
Part D claims, 202443
Drugs named by CMS1
Total drug cost$90,327
Daniel Chrobak's Part D claims by kind of drug, 2024
- Generic28 claims65%
- Brand-name15 claims35%
Daniel Chrobak'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, 2016 to 2024
- 2016
- 2024
- Claims for drugs CMS names
- 2016: 112024: 11No change
Drugs named by CMS: 1 in 2024, 1 in 2016.
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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Daniel James Chrobak has 1 publication on record
Dmand AI links 1 paper to Daniel Chrobak. Daniel Chrobak's most frequent co-author is Joel M. Palefsky, MD.
Papers1
Daniel Chrobak's most frequent co-authors
- Joel M. Palefsky, MD1 shared paper
Recent publications by Daniel Chrobak
See who Daniel Chrobak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Daniel Chrobak works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Daniel James Chrobak graduated from UCSF School of Medicine
Daniel Chrobak graduated from UCSF School of Medicine in 2010.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Sources for Daniel James Chrobak'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 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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Training, board certification and memberships | Dmand AI Professional Profile 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 Daniel James Chrobak
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Daniel James Chrobak's NPI number?
Daniel James Chrobak's NPI number is 1053638106. It was assigned on April 29, 2010, and it is active in the NPI Registry.
What does Daniel James Chrobak specialize in?
Daniel James Chrobak is an internist in Oakland, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Daniel James Chrobak practice?
Daniel Chrobak practices at 350 Hawthorne Avenue, Oakland, CA 94609. Daniel Chrobak's primary practice is Alta Bates Summit Medical Center in Oakland, California, part of Sutter Health.
What is Daniel James Chrobak's office phone number?
The practice phone on file for Daniel Chrobak is (510) 655-4000.
What is Daniel James Chrobak's medical license number?
Daniel Chrobak holds California license A119356.
Which hospitals is Daniel James Chrobak affiliated with?
Daniel Chrobak practices at Alta Bates Summit Medical Center in Oakland, California.
Does Daniel James Chrobak accept Medicare?
Yes. CMS data shows Daniel Chrobak billed Medicare for 44 services in 2023.
Is Daniel James Chrobak board certified?
Yes. Daniel Chrobak is board certified in internal medicine by the American Board of Internal Medicine.
What services does Daniel James Chrobak bill to Medicare?
In 2023, Daniel Chrobak's most billed Medicare services were hospital inpatient care (99223).
Where did Daniel James Chrobak go to medical school?
Daniel Chrobak graduated from UCSF School of Medicine in 2010.
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What drugs does Daniel James Chrobak prescribe most?
In 2024 Medicare Part D data, Daniel Chrobak's most prescribed drugs by claims were Enbrel.
How long has Daniel James Chrobak been practicing?
Daniel Chrobak graduated from medical school in 2010, 16 years ago.
Does Daniel James Chrobak do research?
Dmand AI links 1 publication to Daniel Chrobak.
Who does Daniel James Chrobak publish with?
Daniel Chrobak's most frequent co-authors are Joel M. Palefsky, MD (1 shared paper).
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