William Jacob Wallach
- Part D claims, 2024
- 132
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 525 East 68th Street, New York, NY 10065
- Practice phone
- Call (212) 746-5454
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find William Wallach'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.
William Jacob Wallach is a hospitalist in New York, New York
William Wallach practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital.
William Wallach's NPI, 1720668551, was assigned on April 14, 2021. William Wallach holds New York license 337791.
- NPI
- 1720668551NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284139825
- NPI enumeration date
- April 14, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (212) 746-5454
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
William Jacob Wallach practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York
William Wallach's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center, at 525 East 68th Street, New York, NY 10065 in New York County. The practice phone is (212) 746-5454.
- NewYork-Presbyterian/Weill Cornell Medical Center525 East 68th Street, New York, NY 10065 · New York CountyPhone(212) 746-5454
Source: Dmand AI Affiliation Data
William Jacob Wallach is affiliated with 4 sites of care and 1 medical group
William Wallach's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital. The medical group on file is NewYork-Presbyterian Medical Group/Westchester. Dmand AI also links William Wallach to 2 more clinical labs and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at William Jacob Wallach's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Wallach practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NewYork-Presbyterian/Weill Cornell Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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William Jacob Wallach is one of 1,796 hospitalists in New York
Hospitalist is William Wallach's primary specialty in the NPI Registry, under taxonomy code 208M00000X. William Wallach is licensed in New York.
Specialties and state licenses
- Hospitalist, New YorkPrimary
Hospitalists near William Wallach
Counts of hospitalists 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
William Jacob Wallach's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts William Wallach's median patient age at 67, with 59% women.
William Wallach's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women59%
- Men39%
Source: Dmand AI Patient Panel Data
William Jacob Wallach wrote 132 Medicare Part D claims in 2024
In 2024, William Wallach wrote 132 Medicare Part D claims for 32 patients. 74% of them were for generic drugs. CMS names the drug for 23 of them, across 2 drugs with 11 or more claims each, at $128 in total drug cost.
William Wallach's Part D claims by kind of drug, 2024
- Generic98 claims74%
- Brand-name and other34 claims26%
William Wallach'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.
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 William Jacob Wallach takes part in Medicare
William Wallach 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 William Jacob Wallach'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 William Jacob Wallach
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Jacob Wallach's NPI number?
William Jacob Wallach's NPI number is 1720668551. It was assigned on April 14, 2021, and it is active in the NPI Registry.
What does William Jacob Wallach specialize in?
William Jacob Wallach is a hospitalist in New York, New York. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does William Jacob Wallach practice?
William Wallach practices at 525 East 68th Street, New York, NY 10065. William Wallach's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital. Dmand AI also links William Wallach to 2 clinical labs and 1 group practice or clinic.
What is William Jacob Wallach's office phone number?
The practice phone on file for William Wallach is (212) 746-5454.
What is William Jacob Wallach's medical license number?
William Wallach holds New York license 337791, one of 2 state licenses on file.
Which hospitals is William Jacob Wallach affiliated with?
William Wallach practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York.
What medical group is William Jacob Wallach part of?
William Wallach is linked to NewYork-Presbyterian Medical Group/Westchester.
Does William Jacob Wallach accept Medicare?
Yes. CMS lists William Wallach as accepting Medicare assignment.
What drugs does William Jacob Wallach prescribe most?
In 2024 Medicare Part D data, William Wallach's most prescribed drugs by claims were Duloxetine HCl and Pantoprazole Sodium.
How long has William Jacob Wallach been practicing?
William Wallach graduated from medical school in 2022, 4 years ago.
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