NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1811574668 MD
Verify on CMS → Louisa Bauer, MD
Hospitalist Physician in Portland, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,825 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
470
Medicare Part D claims · 131 beneficiaries · Hospitalist Physician avg: 888
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Louisa Bauer, MD filed 470 Medicare Part D claims in 2023 as a Hospitalist Physician in Portland, Maine.
- 470
- 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.
Louisa Bauer, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
470 Top 38% higher than 62% 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)
Louisa Bauer, 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 Louisa Bauer, MD?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
470 47% vs specialty avg
Specialty distribution in Maine
How Hospitalist Physician compares to other specialties among Maine 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).
Louisa Bauer, MD appears in the CMS NPPES registry as a Hospitalist Physician provider holding MD credentials at 22 BRAMHALL ST, Portland, ME, 04102, with a listed phone of (207) 662-0111. NPI 1811574668 was issued on 03/26/2021.
Medicare Part D records for calendar year 2023 show 470 prescription claims written by this provider, covering 131 Medicare beneficiaries and totaling roughly $56K in drug spend.
Hospitalist Physician is a mid-sized specialty nationwide, with 16,825 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 | 1811574668 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 03/26/2021 |
Hospital and facility affiliations
Facilities where Louisa Bauer, 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.
Mainehealth
Biddeford, 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).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
470
Total Claims
$56K
Total Drug Cost
131
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,075
- Total Day Supply
- 30,931
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 2.01
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Louisa Bauer, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
42 claims
- Omeprazole
Omeprazole
27 claims
- Lisinopril
Lisinopril
20 claims
- Amlodipine Besylate
Amlodipine Besylate
18 claims
- Losartan Potassium
Losartan Potassium
18 claims
- Metoprolol Succinate
Metoprolol Succinate
18 claims
- Albuterol Sulfate … 13
Albuterol Sulfate Hfa
13 claims
- Carvedilol 11
Carvedilol
11 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 42 |
| Omeprazole | 27 |
| Lisinopril | 20 |
| Amlodipine Besylate | 18 |
| Losartan Potassium | 18 |
| Metoprolol Succinate | 18 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 13 |
| Carvedilol | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hospitalist Physician Overview
How Louisa Bauer, MD fits within the Hospitalist Physician landscape nationally.
16,825
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
888
Avg Claims per Provider
Louisa Bauer, MD's 470 claims are below the specialty average of 888.
Nearby Hospitalist Physician Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Bauer.
Dr. Moataz Mohamed Nazmy Abdelnaby
MD
Bangor, ME
Dr. Kelly Aguilar
M.D.
Bangor, ME
Dr. Mohanad Ahmed
MD
Bangor, ME
Dr. Mohammed Al-Nufal
MD
Augusta, ME
Dr. Ahmed Aldilaimi
MD
Waterville, ME
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 Maine 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.
Healthcare Guides
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How to Find a Doctor
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Maine
Frequently Asked Questions
What is Louisa Bauer, MD's specialty? ▼
Louisa Bauer, MD specializes in Hospitalist Physician and practices in Portland, Maine. Credentials: MD.
How much does Louisa Bauer, MD prescribe under Medicare Part D? ▼
In 2023, Louisa Bauer, MD wrote 470 Medicare Part D claims totaling $56K in drug costs for 131 beneficiaries.
Where is Louisa Bauer, MD located? ▼
Louisa Bauer, MD is located at 22 BRAMHALL ST, Portland, ME, 04102. Phone: (207) 662-0111.
What is Louisa Bauer, MD's NPI number? ▼
Louisa Bauer, MD's National Provider Identifier (NPI) is 1811574668, issued on 03/26/2021.
How many Hospitalist Physician providers are there in the US? ▼
There are 16,825 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 Louisa Bauer, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Louisa Bauer, MD's most frequently prescribed drugs include Atorvastatin Calcium, Omeprazole, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Louisa Bauer, MD accept Medicare? ▼
Louisa Bauer, MD appears in CMS Medicare data with 470 Part D claims and 131 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Louisa Bauer, MD's credentials? ▼
Louisa Bauer, MD's NPI is 1811574668 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.