Dr. Randall S. Zielinski, MD
- Medicare services, 2022
- 378
- Part D claims, 2024
- 63
- Hospital affiliations
- 1
- Industry payments
- $526
- Medical group
- 1
- Practice address
- 701 Seneca St, Buffalo, NY 14210
- Practice phone
- Call (716) 995-4450
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Landmark Health NY IPA
Buffalo, New York
Find Dr. Zielinski'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. Randall S. Zielinski is an internist in Buffalo, New York
Dr. Zielinski practices at Landmark Health NY IPA in Buffalo, New York.
Dr. Zielinski's NPI, 1811079585, was assigned on October 20, 2006. Dr. Zielinski holds New Hampshire license 10108.
- NPI
- 1811079585NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6901827856
- NPI enumeration date
- October 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (716) 995-4450
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Randall S. Zielinski practices at Landmark Health NY IPA in Buffalo, New York
Dr. Zielinski's primary practice is Landmark Health NY IPA, at 701 Seneca St, Buffalo, NY 14210 in Erie County. The practice phone is (716) 995-4450.
- Landmark Health NY IPA701 Seneca St, Buffalo, NY 14210 · Erie CountyPhone(716) 995-4450
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Randall S. Zielinski is affiliated with 3 sites of care and 1 medical group
Dr. Zielinski's primary practice is Landmark Health NY IPA in Buffalo, New York. Dr. Zielinski is also affiliated with Wentworth-Douglass Hospital. The medical group on file is Wentworth-Douglass Hospital. Dmand AI also links Dr. Zielinski to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Randall S. Zielinski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zielinski practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Landmark Health NY IPA | 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 each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Randall S. Zielinski is one of 9,643 internists in New York
Internal medicine is Dr. Zielinski's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Zielinski is licensed in New Hampshire.
Specialties and state licenses
- Internal medicine, New HampshirePrimary
Internists near Dr. Zielinski
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. Randall S. Zielinski billed Medicare for 378 services in 2022
CMS data shows 378 Medicare services from Dr. Zielinski across 5 procedure codes in 2022. Medicare paid $28,364 for them. Every service was in an office.
Dr. Zielinski's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 8022022: 33358%
- Other services
- 2021: 2092022: 4578%
- Lab and pathology
- 2021: 202022: 0100%
- Tests and treatments
- 2021: 972022: 0100%
Dr. Zielinski compared with the New York median for internists, 2022
- Dr. Zielinski
- New York median
- Medicare services
- 378vs 42611% below
- Part D claims
- 26vs 62296% below
Medians across 9,428 internists in New York with Dmand AI profiles that report each measure.
Dr. Zielinski's most billed Medicare procedure codes, 2022
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 Dr. Zielinski?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Zielinski and other internists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Randall S. Zielinski's patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Zielinski's median patient age at 68, with 53% women.
Dr. Zielinski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women53%
- Men47%
Source: Dmand AI Patient Panel Data
Dr. Randall S. Zielinski wrote 63 Medicare Part D claims in 2024
In 2024, Dr. Zielinski wrote 63 Medicare Part D claims for 17 patients. 76% of them were for generic drugs. CMS names the drug for 26 of them, across 2 drugs with 11 or more claims each, at $333 in total drug cost. In 2023, CMS named 206 claims across 7 drugs.
Dr. Zielinski's Part D claims by kind of drug, 2024
- Generic48 claims76%
- Brand-name and other15 claims24%
Dr. Zielinski'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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2062024: 2687%
Drugs named by CMS: 2 in 2024, 7 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. Randall S. Zielinski takes part in Medicare
Dr. Zielinski 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
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Randall S. Zielinski received $526 in industry payments from 2017 to 2022
CMS Open Payments shows 13 general payments to Dr. Zielinski from 3 drug and device companies from 2017 to 2022. Food and beverage make up the largest share, 100% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $325.
General payments to Dr. Zielinski by program year, 2017 to 2022
Companies that paid Dr. Zielinski the most, 2017 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Randall S. Zielinski'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 Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (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. Randall S. Zielinski
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. Randall S. Zielinski's NPI number?
Dr. Randall S. Zielinski's NPI number is 1811079585. It was assigned on October 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Randall S. Zielinski?
Dr. Randall S. Zielinski is an internist in Buffalo, New York. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Randall S. Zielinski practice?
Dr. Zielinski practices at 701 Seneca St, Buffalo, NY 14210. Dr. Zielinski's primary practice is Landmark Health NY IPA in Buffalo, New York. Dmand AI also links Dr. Zielinski to 1 group practice or clinic.
What is Dr. Randall S. Zielinski's office phone number?
The practice phone on file for Dr. Zielinski is (716) 995-4450.
What is Dr. Randall S. Zielinski's medical license number?
Dr. Zielinski holds New Hampshire license 10108.
Which hospitals is Dr. Randall S. Zielinski affiliated with?
Dr. Zielinski is affiliated with Wentworth-Douglass Hospital.
What medical group is Dr. Randall S. Zielinski part of?
Dr. Zielinski is linked to Wentworth-Douglass Hospital.
Does Dr. Randall S. Zielinski accept Medicare?
Yes. CMS data shows Dr. Zielinski billed Medicare for 378 services in 2022, and Dr. Zielinski accepts Medicare assignment.
What services does Dr. Randall S. Zielinski bill to Medicare?
In 2022, Dr. Zielinski's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and medicare service (G2212).
What drugs does Dr. Randall S. Zielinski prescribe most?
In 2024 Medicare Part D data, Dr. Zielinski's most prescribed drugs by claims were Levothyroxine Sodium and Famotidine.
Has Dr. Randall S. Zielinski received payments from drug or device companies?
CMS Open Payments shows $526 in general payments to Dr. Zielinski from 3 companies from 2017 to 2022. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Randall S. Zielinski been practicing?
Dr. Zielinski graduated from medical school in 1985, 41 years ago.
Selling to internal medicine practices?
See internists in New York by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card