NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1457797995 M.D.
Verify on CMS → Henry Siem, M.D.
Family Medicine Physician in Colorado Springs, Colorado.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,125 in Family Medicine 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
5K
Medicare Part D claims · 488 beneficiaries · Family Medicine Physician avg: 4K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Henry Siem, M.D. filed 4,869 Medicare Part D claims in 2024 as a Family Medicine Physician in Colorado Springs, Colorado, prescribing 89% generic.
- 5K
- Part D claims, 2024
- 89%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥93rd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Henry Siem, M.D.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1457797995), first enumerated 05/10/2013.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 4,869 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1457797995 · Family Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1457797995
- ENUM-MID 2013
- TAX-MEGA 150K Family Medicine
- RX-MID 4,869
- BOOK-LIGHT 3,406 in Colorado
- PHOTO-ENUM Matthew McCarl, D.O. · 2013
Henry Siem, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
4,869 ≥ 93rd percentile 93% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Henry Siem, M.D. 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 Henry Siem, M.D.?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
4,869 38% vs specialty avg
Specialty distribution in Colorado
How Family Medicine Physician compares to other specialties among Colorado 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 Family Medicine 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).
Practice Address
Provider Details
| NPI | 1457797995 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/10/2013 |
Hospital and facility affiliations
Facilities where Henry Siem, M.D. 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.
Optumcare Colorado Medical Group LLC
Colorado Springs, CO
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
Henry Siem, M.D. - brand share 11.0%
Family Medicine Physician average
11% brand-name claims vs 89% generic, on 4,869 2024 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 2024.
4,869
Total Claims
$395K
Total Drug Cost
488
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,984.1
- Total Day Supply
- 383,954
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $314K
- Generic Drug Cost
- $79K
- Antibiotic Claims
- 68
Patient Demographics
- Average Patient Age
- 74.5 years
- Avg HCC Risk Score
- 1.25
- Gender Split
- 53% female / 47% male
- Age Distribution
- <65: 33, 65-74: 218, 75-84: 177, 85+: 60
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Henry Siem, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Atorvastatin Calcium
Atorvastatin Calcium
332 claims
- Levothyroxine Sodium
Levothyroxine Sodium
279 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
274 claims
- Amlodipine Besylate
Amlodipine Besylate
156 claims
- Lisinopril
Lisinopril
154 claims
- Losartan Potassium
Losartan Potassium
149 claims
- Tamsulosin Hcl 129
Tamsulosin Hcl
129 claims
- Metformin Hcl 112
Metformin Hcl
112 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 332 |
| Levothyroxine Sodium | 279 |
| Rosuvastatin Calcium | 274 |
| Amlodipine Besylate | 156 |
| Lisinopril | 154 |
| Losartan Potassium | 149 |
| Tamsulosin Hcl | 129 |
| Metformin Hcl | 112 |
| Metoprolol Succinate | 101 |
| Omeprazole | 97 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Henry Siem, M.D. fits within the Family Medicine Physician landscape nationally.
150,125
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,519
Avg Claims per Provider
Henry Siem, M.D.'s 4,869 claims are above the specialty average of 3,519.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Siem, both outside Colorado so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Colorado
Other clinicians with the same primary specialty enrolled in Colorado, drawn from the same CMS NPPES roster as Siem.
One of 3,406 Family Medicine Physician providers enrolled in Colorado, 5 are shown here.
Dr. Eric Abbott
D.O.
Colorado Springs, CO
Dr. John Abbott
D.O.
Lamar, CO
Dr. Rasha Abdelsalam
MD
Denver, CO
Baiju Abdulla
M.B.B.S.
Colorado Springs, CO
Dr. Nathalie Abisror
MD
Castle Pines, CO
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Henry Siem, M.D.'s specialty? ▼
Henry Siem, M.D. specializes in Family Medicine Physician and practices in Colorado Springs, Colorado. Credentials: M.D..
How much does Henry Siem, M.D. prescribe under Medicare Part D? ▼
In 2024, Henry Siem, M.D. wrote 4,869 Medicare Part D claims totaling $395K in drug costs for 488 beneficiaries.
Where is Henry Siem, M.D. located? ▼
Henry Siem, M.D. is located at 1633 MEDICAL CENTER PT, Colorado Springs, CO, 80907. Phone: (719) 598-9446.
What is Henry Siem, M.D.'s NPI number? ▼
Henry Siem, M.D.'s National Provider Identifier (NPI) is 1457797995, issued on 05/10/2013.
Does Henry Siem, M.D. prescribe more brand-name or generic drugs? ▼
Henry Siem, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $314K in brand drug costs.
How many Family Medicine Physician providers are there in the US? ▼
There are 150,125 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,519 Medicare Part D claims per year.
What drugs does Henry Siem, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Henry Siem, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Rosuvastatin Calcium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Henry Siem, M.D. accept Medicare? ▼
Henry Siem, M.D. appears in CMS Medicare data with 4,869 Part D claims and 488 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Henry Siem, M.D.'s credentials? ▼
Henry Siem, M.D.'s NPI is 1457797995 with credentials M.D.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.