NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1619291127 D.O.
Verify on CMS → Ann Kellogg, D.O.
Hospitalist Physician in Bend, Oregon.
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
1K
Medicare Part D claims · 132 beneficiaries · Hospitalist Physician avg: 888
Generic prescribing
87%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ann Kellogg, D.O. filed 1,122 Medicare Part D claims in 2023 as a Hospitalist Physician in Bend, Oregon, prescribing 87% generic.
- 1K
- Part D claims, 2023
- 87%
- generic prescribing
- 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.
Ann Kellogg, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,122 Top 23% higher than 77% 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)
Ann Kellogg, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 hospital affiliations - 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 Ann Kellogg, D.O.?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
1,122 26% vs specialty avg
Specialty distribution in Oregon
How Hospitalist Physician compares to other specialties among Oregon 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).
Ann Kellogg, D.O. appears in the CMS NPPES registry as a Hospitalist Physician provider holding D.O. credentials at 2500 NE NEFF RD, Bend, OR, 97701, with a listed phone of (541) 382-4321. NPI 1619291127 was issued on 03/26/2010.
Medicare Part D records for calendar year 2023 show 1,122 prescription claims written by this provider, covering 132 Medicare beneficiaries and totaling roughly $116K in drug spend, split 12% brand-name and 87% generic by claim count, with an opioid prescribing rate of 1.7%.
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 | 1619291127 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | D.O. |
| Gender | Female |
| NPI Issued | 03/26/2010 |
Hospital and facility affiliations
Facilities where Ann Kellogg, D.O. 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.
Coquille Valley Hospital District
Coquille, OR
St Charles Health System Inc
Redmond, OR
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Ann Kellogg, D.O. - brand share 12.0%
Hospitalist Physician average
12% brand-name claims vs 87% generic, on 1,122 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,122
Total Claims
$116K
Total Drug Cost
132
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,072
- Total Day Supply
- 59,419
- Brand vs Generic
- 12% brand / 87% generic
- Brand Drug Cost
- $88K
- Generic Drug Cost
- $27K
- Opioid Claims
- 19 (1.7% rate)
- Antibiotic Claims
- 27
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 13, 65-74: 69, 75-84: 34, 85+: 16
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ann Kellogg, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
52 claims
- Gabapentin
Gabapentin
45 claims
- Atorvastatin Calcium
Atorvastatin Calcium
40 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
40 claims
- Losartan Potassium
Losartan Potassium
37 claims
- Levothyroxine Sodium
Levothyroxine Sodium
29 claims
- Lisinopril
Lisinopril
25 claims
- Ventolin Hfa
Ventolin Hfa
24 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 52 |
| Gabapentin | 45 |
| Atorvastatin Calcium | 40 |
| Rosuvastatin Calcium | 40 |
| Losartan Potassium | 37 |
| Levothyroxine Sodium | 29 |
| Lisinopril | 25 |
| Ventolin Hfa Albuterol Sulfate | 24 |
| Furosemide | 23 |
| Propranolol Hcl | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Ann Kellogg, D.O. fits within the Hospitalist Physician landscape nationally.
16,938
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Ann Kellogg, D.O.'s 1,122 claims are above the specialty average of 888.
Nearby Hospitalist Physician Providers in Oregon
Other clinicians with the same primary specialty enrolled in Oregon, drawn from the same CMS NPPES roster as Kellogg.
Dr. Anshu Aery
MD
Medford, OR
Dr. Alison Agnetta
MD
Salem, OR
Dr. Sarah Agsten
DO
Roseburg, OR
Dr. Sharif Ahmed
M.D.
Portland, OR
Dr. Zainab Aina-Shittu
MD
Medford, OR
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 Oregon 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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Frequently Asked Questions
What is Ann Kellogg, D.O.'s specialty? ▼
Ann Kellogg, D.O. specializes in Hospitalist Physician and practices in Bend, Oregon. Credentials: D.O..
How much does Ann Kellogg, D.O. prescribe under Medicare Part D? ▼
In 2023, Ann Kellogg, D.O. wrote 1,122 Medicare Part D claims totaling $116K in drug costs for 132 beneficiaries.
Where is Ann Kellogg, D.O. located? ▼
Ann Kellogg, D.O. is located at 2500 NE NEFF RD, Bend, OR, 97701. Phone: (541) 382-4321.
What is Ann Kellogg, D.O.'s NPI number? ▼
Ann Kellogg, D.O.'s National Provider Identifier (NPI) is 1619291127, issued on 03/26/2010.
Does Ann Kellogg, D.O. prescribe more brand-name or generic drugs? ▼
Ann Kellogg, D.O.'s prescribing is 12% brand-name and 87% generic drugs by claim count, with $88K in brand drug costs.
Does Ann Kellogg, D.O. prescribe opioids? ▼
Yes, Ann Kellogg, D.O. had 19 opioid claims in 2023 with an opioid prescribing rate of 1.7%.
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 Ann Kellogg, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ann Kellogg, D.O.'s most frequently prescribed drugs include Amlodipine Besylate, Gabapentin, Atorvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ann Kellogg, D.O. accept Medicare? ▼
Ann Kellogg, D.O. appears in CMS Medicare data with 1,122 Part D claims and 132 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ann Kellogg, D.O.'s credentials? ▼
Ann Kellogg, D.O.'s NPI is 1619291127 with credentials D.O.. 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.