Dr. Daniel D. Mast, DO
- Medicare services, 2020
- 181
- Part D claims, 2024
- 2,204
- Industry payments
- $1,562
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 802 New Holland Ave, Suite 200, Lancaster, PA 17602
- Practice phone
- Call (717) 299-6371
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lancaster Grandview Plaza
FQHC - Main Site · Lancaster, Pennsylvania
Find Dr. Mast'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 D. Mast is an internist in Lancaster, Pennsylvania
Dr. Mast practices at Lancaster Grandview Plaza in Lancaster, Pennsylvania.
Dr. Mast's NPI, 1104910140, was assigned on October 3, 2006. Dr. Mast holds Pennsylvania license OS-006313L.
- NPI
- 1104910140NPI Registry (opens in a new tab)
- NPI enumeration date
- October 3, 2006
- NPI status
- Active
- Practice phone
- (717) 299-6371
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Daniel D. Mast practices at Lancaster Grandview Plaza in Lancaster, Pennsylvania
Dr. Mast's primary practice is Lancaster Grandview Plaza, at 802 New Holland Ave, Suite 200, Lancaster, PA 17602 in Lancaster County. The practice phone is (717) 299-6371.
- Lancaster Grandview Plaza802 New Holland Ave, Suite 200, Lancaster, PA 17602 · Lancaster CountyPhone(717) 299-6371
Source: Dmand AI Affiliation Data
Dr. Daniel D. Mast is affiliated with 1 site of care and 1 medical group
Dr. Mast's primary practice is Lancaster Grandview Plaza in Lancaster, Pennsylvania. The medical group on file is Union Community Care. Dr. Mast's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Daniel D. Mast's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mast practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lancaster Grandview Plaza | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Daniel D. Mast is one of 5,665 internists in Pennsylvania
Internal medicine is Dr. Mast's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Mast's licenses on file in 2 states: Pennsylvania and Delaware.
Specialties and state licenses
- Internal medicine, PennsylvaniaPrimary
- Delaware license
Internists near Dr. Mast
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. Daniel D. Mast billed Medicare for 181 services in 2020
CMS data shows 181 Medicare services from Dr. Mast across 4 procedure codes in 2020. Medicare paid $7,009 for them. Every service was in an office.
Dr. Mast's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 3182020: 15252%
- Tests and treatments
- 2019: 692020: 2958%
- Surgery
- 2019: 1132020: 0100%
Dr. Mast compared with the Pennsylvania median for internists, 2020
- Dr. Mast
- Pennsylvania median
- Medicare services
- 181vs 41757% below
- Part D claims
- 1,730vs 2247.7 times
Medians across 5,518 internists in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Mast's most billed Medicare procedure codes, 2020
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. Mast and other internists in Pennsylvania.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Daniel D. Mast's patients have a median age of 51
Across all payers, Dmand AI patient panel data puts Dr. Mast's median patient age at 51, with 43% women.
Dr. Mast's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women43%
- Men57%
Source: Dmand AI Patient Panel Data
Dr. Daniel D. Mast wrote 2,204 Medicare Part D claims in 2024
In 2024, Dr. Mast wrote 2,204 Medicare Part D claims for 143 patients. 87% of them were for generic drugs. CMS names the drug for 1,730 of them, across 58 drugs with 11 or more claims each, at $192,642 in total drug cost. In 2023, CMS named 1,385 claims across 53 drugs.
Dr. Mast's Part D claims by kind of drug, 2024
- Generic1,908 claims87%
- Brand-name270 claims12%
- Other26 claims1%
Dr. Mast'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.
Drug classes CMS tracks in Dr. Mast's Part D claims, 2024
- Opioids4%90 of 2,204 claims
- Antibiotics1%22 of 2,204 claims
- Antipsychotics, patients 65 and over1%22 of 2,204 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,3852024: 1,73025%
Drugs named by CMS: 58 in 2024, 53 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
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Dr. Daniel D. Mast received $1,562 in industry payments from 2016 to 2022
CMS Open Payments shows 47 general payments to Dr. Mast from 13 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 87% of the total. Smith & Nephew, Inc. paid the most, $501.
General payments to Dr. Mast by program year, 2016 to 2022
General payments to Dr. Mast by kind, 2016 to 2022
- Food and beverage$1,35287%
- Consulting fees$21013%
Companies that paid Dr. Mast the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Daniel D. Mast'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) |
| 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. Daniel D. Mast
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 D. Mast's NPI number?
Dr. Daniel D. Mast's NPI number is 1104910140. It was assigned on October 3, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Daniel D. Mast?
Dr. Daniel D. Mast is an internist in Lancaster, Pennsylvania. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Daniel D. Mast practice?
Dr. Mast practices at 802 New Holland Ave, Suite 200, Lancaster, PA 17602. Dr. Mast's primary practice is Lancaster Grandview Plaza in Lancaster, Pennsylvania.
What is Dr. Daniel D. Mast's office phone number?
The practice phone on file for Dr. Mast is (717) 299-6371.
What is Dr. Daniel D. Mast's medical license number?
Dr. Mast holds Pennsylvania license OS-006313L, one of the licenses on file in 2 states.
Which states has Dr. Daniel D. Mast been licensed in?
Dmand AI has state licenses on file for Dr. Mast in Pennsylvania and Delaware.
What medical group is Dr. Daniel D. Mast part of?
Dr. Mast is linked to Union Community Care.
Does Dr. Daniel D. Mast accept Medicare?
Yes. CMS data shows Dr. Mast billed Medicare for 181 services in 2020.
What services does Dr. Daniel D. Mast bill to Medicare?
In 2020, Dr. Mast's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, established patient (99212).
What drugs does Dr. Daniel D. Mast prescribe most?
In 2024 Medicare Part D data, Dr. Mast's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Omeprazole.
Has Dr. Daniel D. Mast received payments from drug or device companies?
CMS Open Payments shows $1,562 in general payments to Dr. Mast from 13 companies from 2016 to 2022. The largest total came from Smith & Nephew, Inc.
How long has Dr. Daniel D. Mast been practicing?
Dr. Mast's NPI was assigned in 2006.
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