Dr. Daniel I. Geisser, MD
- Medicare services, 2018
- 687
- Part D claims, 2021
- 15
- Affiliated sites
- 1
- Medical group
- 1
- State license
- 1
- Practice address
- 55 Lock St, New Haven, CT 06511-3603
- Practice phone
- Call (203) 432-0076
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Yale Health Center
Multi-specialty group site · New Haven, Connecticut
Find Dr. Geisser'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.
Dr. Daniel I. Geisser is a nephrologist in Los Angeles, California
Dr. Geisser practices at Yale Health Center in New Haven, Connecticut.
Dr. Geisser's NPI, 1558346056, was assigned on December 7, 2005. Dr. Geisser holds Connecticut license 025973.
- NPI
- 1558346056NPI Registry (opens in a new tab)
- NPI enumeration date
- December 7, 2005
- NPI status
- Active
- Practice phone
- (203) 432-0076
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Daniel I. Geisser practices in New Haven and Los Angeles
Dr. Geisser's primary practice is Yale Health Center, at 55 Lock St, New Haven, CT 06511-3603. The practice phone is (203) 432-0076. The NPI Registry lists Dr. Geisser's practice address as 757 Westwood Plz, Los Angeles, CA 90095.
- Yale Health CenterPrimary55 Lock St, New Haven, CT 06511-3603Phone(203) 432-0076
- NPI Registry address757 Westwood Plz, Los Angeles, CA 90095 · Los Angeles CountyPhone(203) 432-0076
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Daniel I. Geisser is affiliated with 1 site of care and 1 medical group
Dr. Geisser's primary practice is Yale Health Center in New Haven, Connecticut. The medical group on file is Yale Health.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Daniel I. Geisser's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Geisser practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Yale Health Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel I. Geisser is one of 1,401 nephrologists in California
Nephrology is Dr. Geisser's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Geisser is licensed in Connecticut.
Specialties and state licenses
- Nephrology, ConnecticutPrimary
Nephrologists near Dr. Geisser
Counts of nephrologists 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. Daniel I. Geisser billed Medicare for 687 services in 2018
CMS data shows 687 Medicare services from Dr. Geisser across 4 procedure codes in 2018. Medicare paid $33,603 for them. Every service was in an office.
Dr. Geisser's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 5842018: 47020%
- Lab and pathology
- 2017: 2112018: 15726%
- Other services
- 2017: 892018: 6033%
Dr. Geisser compared with the California median for nephrologists, 2018
- Dr. Geisser
- California median
- Medicare services
- 687vs 1,08437% below
- Part D claims
- 15vs 95598% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Geisser's most billed Medicare procedure codes, 2018
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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Geisser and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel I. Geisser's patients have a median age of 79
Across all payers, Dmand AI patient panel data puts Dr. Geisser's median patient age at 79, with 13% women.
Dr. Geisser's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 79
Patient panel by sex, all payers
- Women13%
- Men80%
Source: Dmand AI Patient Panel Data
Dr. Daniel I. Geisser wrote 15 Medicare Part D claims in 2021
In 2021, Dr. Geisser wrote 15 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $169 in total drug cost. In 2020, CMS named 1,310 claims across 35 drugs.
Dr. Geisser's most prescribed drugs by claims, 2021
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, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 1,3102021: 1599%
Drugs named by CMS: 1 in 2021, 35 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Sources for Dr. Daniel I. Geisser'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 Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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) |
| 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. Daniel I. Geisser
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. Daniel I. Geisser's NPI number?
Dr. Daniel I. Geisser's NPI number is 1558346056. It was assigned on December 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel I. Geisser?
Dr. Daniel I. Geisser is a nephrologist in Los Angeles, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Daniel I. Geisser practice?
Dr. Geisser practices at 55 Lock St, New Haven, CT 06511-3603. Dr. Geisser also practices at 757 Westwood Plz, Los Angeles, CA 90095. Dr. Geisser's primary practice is Yale Health Center in New Haven, Connecticut.
What is Dr. Daniel I. Geisser's office phone number?
The practice phone on file for Dr. Geisser is (203) 432-0076.
What is Dr. Daniel I. Geisser's medical license number?
Dr. Geisser holds Connecticut license 025973.
What medical group is Dr. Daniel I. Geisser part of?
Dr. Geisser is linked to Yale Health.
Does Dr. Daniel I. Geisser accept Medicare?
Yes. CMS data shows Dr. Geisser billed Medicare for 687 services in 2018.
What services does Dr. Daniel I. Geisser bill to Medicare?
In 2018, Dr. Geisser's most billed Medicare services were office visit, established patient (99213), lab and pathology test (85610) and medicare service (G0439).
What drugs does Dr. Daniel I. Geisser prescribe most?
In 2021 Medicare Part D data, Dr. Geisser's most prescribed drugs by claims were Atorvastatin Calcium.
How long has Dr. Daniel I. Geisser been practicing?
Dr. Geisser's NPI was assigned in 2005.
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