NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1902842453 MD
Verify on CMS → William Stief, MD
Emergency Medicine Physician in Hermann, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 66,293 in Emergency 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
194
Medicare Part D claims · 136 beneficiaries · Emergency Medicine Physician avg: 355
MIPS score
85.5/100
▲ 2 pts above national avg 83.5 · Above neutral
What the federal data shows
William Stief, MD reported a CMS MIPS final score of 85.5/100 - above the 83.5 national average - and filed 194 Medicare Part D claims in 2024.
- 85.5/100
- MIPS score · +2 vs avg
- 194
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥46th
- pct among measured MIPS (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 William Stief, MD
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1902842453), first enumerated 06/22/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 194 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 85.5/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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.
- 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 1902842453 · Emergency Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · MIPS-INLINE · RX-LIGHT · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1902842453
- ENUM-LEGACY 2006
- TAX-MEGA 66K Emergency Medicine
- MIPS-INLINE 85.5/100
- RX-LIGHT 194
- BOOK-LIGHT 1,352 in Missouri
- PHOTO-FINISH Travis Cosban · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Stief · this pro…
Stief · this provider
85.5 MIPS pts
- Charles Owen · h…
Charles Owen
85.5 MIPS pts
- Travis Cosban · …
Travis Cosban
85.5 MIPS pts
- James Howard · n…
James Howard
85.5 MIPS pts
- Mehran Moradi · …
Mehran Moradi
85.5 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
William Stief, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
86 ≥ 46th percentile 46% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where William Stief, MD sits
This provider among emergency medicine physician peers
Across the 14,017 emergency medicine physician providers who report both Medicare Part D prescribing and a MIPS quality score, William Stief, MD writes more Part D claims than 61% of them and scores higher on MIPS quality than 35% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one emergency medicine physician peer from a representative sample of 60; the gold marker is William Stief, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
William Stief, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 William Stief, MD?
High performer (top quartile)Primary specialty
Emergency Medicine Physician
Medicare Part D claims
194 45% vs specialty avg
MIPS final score
85.5/100 2 pts vs avg
Specialty distribution in Missouri
How Emergency Medicine Physician compares to other specialties among Missouri providers
Medicare quality performance, MIPS
William Stief, MD's 2023 MIPS final score plotted against the Emergency Medicine Physician national average
- MIPS Final Score
- 85.5/100
- vs 83.5 national avg · 2023 performance year
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 | 1902842453 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/22/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
85.542
Final Score
Measured-score avg: 83.5
67.5722
Quality
Reporting: Group practice
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
194
Total Claims
$3K
Total Drug Cost
136
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 194
- Total Day Supply
- 1,480
- Generic Drug Cost
- $1K
- Opioid Claims
- 39 (20.1% rate)
- Antibiotic Claims
- 65
Patient Demographics
- Average Patient Age
- 73.4 years
- Avg HCC Risk Score
- 1.41
- Gender Split
- 63% female / 38% male
- Age Distribution
- <65: 15, 65-74: 55, 75-84: 53, 85+: 13
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What William Stief, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tramadol Hcl
Tramadol Hcl
33 claims
- Ondansetron Odt
Ondansetron Odt
22 claims
- Nitrofurantoin Mon…
Nitrofurantoin Mono-Macro
21 claims
- Cyclobenzaprine Hcl
Cyclobenzaprine Hcl
19 claims
- Methylprednisolone
Methylprednisolone
19 claims
| Drug | Claims |
|---|---|
| Tramadol Hcl | 33 |
| Ondansetron Odt Ondansetron | 22 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 21 |
| Cyclobenzaprine Hcl | 19 |
| Methylprednisolone | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How William Stief, MD fits within the Emergency Medicine Physician landscape nationally.
66,293
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
355
Avg Claims per Provider
William Stief, MD's 194 claims are below the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Stief, both outside Missouri so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (85.5 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Emergency Medicine Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Stief.
One of 1,352 Emergency Medicine Physician providers enrolled in Missouri, 5 are shown here.
Dr. Robert Abbott
M.D.
Saint Charles, MO
Dr. Nagla Abdelmalek
M.D.
Saint Louis, MO
Dr. Donald Ables
MD
Kansas City, MO
Dr. Enyo Ablordeppey
MD
Saint Louis, MO
Dr. Allison Abma
DO
Branson, MO
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is William Stief, MD's specialty? ▼
William Stief, MD specializes in Emergency Medicine Physician and practices in Hermann, Missouri. Credentials: MD.
How much does William Stief, MD prescribe under Medicare Part D? ▼
In 2024, William Stief, MD wrote 194 Medicare Part D claims totaling $3K in drug costs for 136 beneficiaries.
What is William Stief, MD's Medicare quality score? ▼
William Stief, MD has a CMS MIPS Final Score of 85.5/100 (Quality: 67.6). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is William Stief, MD located? ▼
William Stief, MD is located at 509 W 18TH ST, Hermann, MO, 65041. Phone: (573) 486-2191.
What is William Stief, MD's NPI number? ▼
William Stief, MD's National Provider Identifier (NPI) is 1902842453, issued on 06/22/2006.
Does William Stief, MD prescribe opioids? ▼
Yes, William Stief, MD had 39 opioid claims in 2024 with an opioid prescribing rate of 20.1%.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 66,293 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 355 Medicare Part D claims per year.
What drugs does William Stief, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, William Stief, MD's most frequently prescribed drugs include Tramadol Hcl, Ondansetron Odt, Nitrofurantoin Mono-Macro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Stief, MD accept Medicare? ▼
William Stief, MD appears in CMS Medicare data with 194 Part D claims and 136 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Stief, MD's credentials? ▼
William Stief, MD's NPI is 1902842453 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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.