Dr. Michael Lance Gerstenfeld, MD
- Part D claims, 2024
- 35
- Hospital affiliations
- 2
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2007
- Practice address
- 100 Woods Rd, Valhalla, NY 10595
- Practice phone
- Call (914) 493-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Gerstenfeld'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. Michael Lance Gerstenfeld is an internist in Valhalla, New York
Dr. Gerstenfeld practices at Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network.
Dr. Gerstenfeld's NPI, 1740311208, was assigned on March 8, 2007. Dr. Gerstenfeld holds Connecticut license 031959.
- NPI
- 1740311208NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6002096336
- NPI enumeration date
- March 8, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (914) 493-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Lance Gerstenfeld practices at Westchester Medical Center in Valhalla, New York
Dr. Gerstenfeld's primary practice is Westchester Medical Center, at 100 Woods Rd, Valhalla, NY 10595 in Westchester County. The practice phone is (914) 493-7000.
- Westchester Medical Center100 Woods Rd, Valhalla, NY 10595 · Westchester CountyPhone(914) 493-7000
Source: Dmand AI Affiliation Data
Dr. Michael Lance Gerstenfeld is affiliated with 3 sites of care and 1 medical group
Dr. Gerstenfeld's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network. Dr. Gerstenfeld is also affiliated with Northwell Danbury Hospital. The medical group on file is M Medical Group. Dmand AI also links Dr. Gerstenfeld to 1 more physician office, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Michael Lance Gerstenfeld's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gerstenfeld practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Westchester Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Westchester Medical Center Health Network and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Michael Lance Gerstenfeld is one of 9,643 internists in New York
Internal medicine is Dr. Gerstenfeld's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Gerstenfeld is licensed in Connecticut.
Specialties and state licenses
- Internal medicine, ConnecticutPrimary
Internists near Dr. Gerstenfeld
Counts of internists 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. Michael Lance Gerstenfeld's patients have a median age of 44
Across all payers, Dmand AI patient panel data puts Dr. Gerstenfeld's median patient age at 44, with 63% women.
Dr. Gerstenfeld's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 44
Patient panel by sex, all payers
- Women63%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Michael Lance Gerstenfeld wrote 35 Medicare Part D claims in 2024
In 2024, Dr. Gerstenfeld wrote 35 Medicare Part D claims. 80% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $6,268 in total drug cost. In 2022, CMS named 38 claims across 3 drugs.
Dr. Gerstenfeld's Part D claims by kind of drug, 2024
- Generic28 claims80%
- Brand-name and other7 claims20%
Dr. Gerstenfeld's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 382023: 1561%
Drugs named by CMS: 1 in 2023, 3 in 2022.
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. Michael Lance Gerstenfeld takes part in Medicare
Dr. Gerstenfeld 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)
For MedTech and pharma teams
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Sources for Dr. Michael Lance Gerstenfeld'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) |
| 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. Michael Lance Gerstenfeld
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. Michael Lance Gerstenfeld's NPI number?
Dr. Michael Lance Gerstenfeld's NPI number is 1740311208. It was assigned on March 8, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Lance Gerstenfeld?
Dr. Michael Lance Gerstenfeld is an internist in Valhalla, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Lance Gerstenfeld practice?
Dr. Gerstenfeld practices at 100 Woods Rd, Valhalla, NY 10595. Dr. Gerstenfeld's primary practice is Westchester Medical Center in Valhalla, New York, part of Westchester Medical Center Health Network. Dmand AI also links Dr. Gerstenfeld to 1 physician office.
What is Dr. Michael Lance Gerstenfeld's office phone number?
The practice phone on file for Dr. Gerstenfeld is (914) 493-7000.
What is Dr. Michael Lance Gerstenfeld's medical license number?
Dr. Gerstenfeld holds Connecticut license 031959.
Which hospitals is Dr. Michael Lance Gerstenfeld affiliated with?
Dr. Gerstenfeld practices at Westchester Medical Center in Valhalla, New York. Dr. Gerstenfeld is also affiliated with Northwell Danbury Hospital.
What medical group is Dr. Michael Lance Gerstenfeld part of?
Dr. Gerstenfeld is linked to M Medical Group.
Does Dr. Michael Lance Gerstenfeld accept Medicare?
Yes. CMS lists Dr. Gerstenfeld as accepting Medicare assignment.
What drugs does Dr. Michael Lance Gerstenfeld prescribe most?
In 2023 Medicare Part D data, Dr. Gerstenfeld's most prescribed drugs by claims were Symbicort.
How long has Dr. Michael Lance Gerstenfeld been practicing?
Dr. Gerstenfeld graduated from medical school in 1987, 39 years ago.
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