NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1659381440 MD
Verify on CMS → Timothy Zeller, MD
Hospitalist Physician in Walhalla, South Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,938 in Hospitalist Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
834
Medicare Part D claims · 81 beneficiaries · Hospitalist Physician avg: 888
Industry payments
$25.16
1 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Timothy Zeller, MD filed 834 Medicare Part D claims in 2023 as a Hospitalist Physician in Walhalla, South Carolina.
- 834
- Part D claims, 2023
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Timothy Zeller, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
834 Top 27% higher than 73% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
Timothy Zeller, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Timothy Zeller, MD?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
834 6% vs specialty avg
Specialty distribution in South Carolina
How Hospitalist Physician compares to other specialties among South Carolina providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Hospitalist Physician. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Timothy Zeller, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 200 BOOKER DR, Walhalla, SC, 29691, with a listed phone of (864) 656-3076. NPI 1659381440 was issued on 08/08/2006.
Medicare Part D records for calendar year 2023 show 834 prescription claims written by this provider, covering 81 Medicare beneficiaries and totaling roughly $74K in drug spend, with an opioid prescribing rate of 7.9%.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,938 enrolled providers across 54 states and an average of 888 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1659381440 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/08/2006 |
Hospital and facility affiliations
Facilities where Timothy Zeller, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Eastern Maine Medical Center
Bangor, ME
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Timothy Zeller, MD. Source: openpaymentsdata.cms.gov.
Total received
$25
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
834
Total Claims
$74K
Total Drug Cost
81
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,806
- Total Day Supply
- 52,553
- Generic Drug Cost
- $14K
- Opioid Claims
- 66 (7.9% rate)
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 71.8 years
- Avg HCC Risk Score
- 1.53
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 14, 65-74: 33, 75-84: 23, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Timothy Zeller, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
31 claims
- Atorvastatin Calcium
Atorvastatin Calcium
31 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
26 claims
- Omeprazole
Omeprazole
25 claims
- Lisinopril
Lisinopril
24 claims
- Furosemide
Furosemide
19 claims
- Duloxetine Hcl
Duloxetine Hcl
18 claims
- Levothyroxine Sodium
Levothyroxine Sodium
18 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 31 |
| Atorvastatin Calcium | 31 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 26 |
| Omeprazole | 25 |
| Lisinopril | 24 |
| Furosemide | 19 |
| Duloxetine Hcl | 18 |
| Levothyroxine Sodium | 18 |
| Warfarin Sodium | 18 |
| Amitriptyline Hcl | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Timothy Zeller, MD fits within the Hospitalist Physician landscape nationally.
16,938
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Timothy Zeller, MD's 834 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in South Carolina
Other clinicians with the same primary specialty enrolled in South Carolina, drawn from the same CMS NPPES roster as Zeller.
Dr. Jonathan Acra
MD
Greenville, SC
Dr. Frank Adusei-Poku
MD
Columbia, SC
Dr. Rola Akache
DO
Summerville, SC
Mahabuba Akhter
Seneca, SC
Dr. Choncharoen Amphan
MD
Spartanburg, SC
Compare Hospitalist Physician nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the South Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Hospitalist Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Medical Specialties Explained
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Explore South Carolina
Frequently Asked Questions
What is Timothy Zeller, MD's specialty? ▼
Timothy Zeller, MD specializes in Hospitalist Physician and practices in Walhalla, South Carolina. Credentials: MD.
How much does Timothy Zeller, MD prescribe under Medicare Part D? ▼
In 2023, Timothy Zeller, MD wrote 834 Medicare Part D claims totaling $74K in drug costs for 81 beneficiaries.
Where is Timothy Zeller, MD located? ▼
Timothy Zeller, MD is located at 200 BOOKER DR, Walhalla, SC, 29691. Phone: (864) 656-3076.
What is Timothy Zeller, MD's NPI number? ▼
Timothy Zeller, MD's National Provider Identifier (NPI) is 1659381440, issued on 08/08/2006.
Does Timothy Zeller, MD prescribe opioids? ▼
Yes, Timothy Zeller, MD had 66 opioid claims in 2023 with an opioid prescribing rate of 7.9%.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,938 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 888 Medicare Part D claims per year.
What drugs does Timothy Zeller, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Timothy Zeller, MD's most frequently prescribed drugs include Amlodipine Besylate, Atorvastatin Calcium, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Timothy Zeller, MD accept Medicare? ▼
Timothy Zeller, MD appears in CMS Medicare data with 834 Part D claims and 81 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Timothy Zeller, MD's credentials? ▼
Timothy Zeller, MD's NPI is 1659381440 with credentials MD. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.