NPI registry status
Active
2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1558378216 MD
Verify on CMS → Carolyn Jachna, MD
Endocrinology, Diabetes & Metabolism Physician in Saint Louis, 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 7,852 in Endocrinology, Diabetes & Metabolism 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
10K
Medicare Part D claims · 1K beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
88%
generic claims · 11% 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
Carolyn Jachna, MD filed 9,639 Medicare Part D claims in 2023 as a Endocrinology, Diabetes & Metabolism Physician in Saint Louis, Missouri, prescribing 88% generic.
- 10K
- Part D claims, 2023
- 88%
- 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.
Carolyn Jachna, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
9,639 Top 2% higher than 98% 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)
Carolyn Jachna, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 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 Carolyn Jachna, MD?
Quality data not reportedPrimary specialty
Endocrinology, Diabetes & Metabolism Physician
Medicare Part D claims
9,639 265% vs specialty avg
Specialty distribution in Missouri
How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Missouri 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 Endocrinology, Diabetes & Metabolism 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).
Carolyn Jachna, MD appears in the CMS NPPES registry as a Endocrinology, Diabetes & Metabolism Physician provider holding MD credentials at 10 BARNES WEST DR, Saint Louis, MO, 63141, with a listed phone of (314) 454-7775. NPI 1558378216 was issued on 08/02/2006.
Medicare Part D records for calendar year 2023 show 9,639 prescription claims written by this provider, covering 1,092 Medicare beneficiaries and totaling roughly $932K in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 2.2%.
Endocrinology, Diabetes & Metabolism Physician is a mid-sized specialty nationwide, with 7,852 enrolled providers across 54 states and an average of 2,639 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 | 1558378216 |
|---|---|
| Specialty | Endocrinology, Diabetes & Metabolism Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/02/2006 |
Hospital and facility affiliations
Facilities where Carolyn Jachna, 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.
According to CMS billing records, Carolyn Jachna, MD is affiliated with 3 Medicare-billing facilities.
Elite Physical Therapy OF Creve Coeur LLC
Creve Coeur, MO
Physician Groups LC
Saint Louis, MO
Washington University
Saint Louis, MO
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
Carolyn Jachna, MD - brand share 11.0%
Endocrinology, Diabetes & Metabolism Physician average
11% brand-name claims vs 88% generic, on 9,639 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.
9,639
Total Claims
$932K
Total Drug Cost
1,092
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 23,461
- Total Day Supply
- 685,321
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $752K
- Generic Drug Cost
- $176K
- Opioid Claims
- 215 (2.2% rate)
- Antibiotic Claims
- 141
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 0.93
- Gender Split
- 82% female / 18% male
- Age Distribution
- <65: 55, 65-74: 583, 75-84: 376, 85+: 78
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Carolyn Jachna, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
583 claims
- Levothyroxine Sodium
Levothyroxine Sodium
477 claims
- Amlodipine Besylate
Amlodipine Besylate
398 claims
- Losartan Potassium
Losartan Potassium
386 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
306 claims
- Simvastatin
Simvastatin
292 claims
- Omeprazole
Omeprazole
275 claims
- Lisinopril
Lisinopril
264 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 583 |
| Levothyroxine Sodium | 477 |
| Amlodipine Besylate | 398 |
| Losartan Potassium | 386 |
| Rosuvastatin Calcium | 306 |
| Simvastatin | 292 |
| Omeprazole | 275 |
| Lisinopril | 264 |
| Ibandronate Sodium | 215 |
| Hydrochlorothiazide | 209 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Endocrinology, Diabetes & Metabolism Physician in MO →
All providers in Missouri →
Compare specialties →
Endocrinology, Diabetes & Metabolism Physician Overview
How Carolyn Jachna, MD fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.
7,852
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider
Carolyn Jachna, MD's 9,639 claims are above the specialty average of 2,639.
Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Jachna.
Dr. Ehab Abdelgyed
M.B.B.CH
Joplin, MO
Dr. Pratibha Abraham
MD
Fenton, MO
Dr. Maha Abu Kishk
M.D.
Kansas City, MO
Dr. Sonya Addison
M.D.
Columbia, MO
Dr. Huda Al-Bahadili
MD
Saint Louis, MO
Compare Endocrinology, Diabetes & Metabolism 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 Missouri medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Endocrinology, Diabetes & Metabolism 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
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
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 Missouri
Frequently Asked Questions
What is Carolyn Jachna, MD's specialty? ▼
Carolyn Jachna, MD specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Saint Louis, Missouri. Credentials: MD.
How much does Carolyn Jachna, MD prescribe under Medicare Part D? ▼
In 2023, Carolyn Jachna, MD wrote 9,639 Medicare Part D claims totaling $932K in drug costs for 1,092 beneficiaries.
Where is Carolyn Jachna, MD located? ▼
Carolyn Jachna, MD is located at 10 BARNES WEST DR, Saint Louis, MO, 63141. Phone: (314) 454-7775.
What is Carolyn Jachna, MD's NPI number? ▼
Carolyn Jachna, MD's National Provider Identifier (NPI) is 1558378216, issued on 08/02/2006.
Does Carolyn Jachna, MD prescribe more brand-name or generic drugs? ▼
Carolyn Jachna, MD's prescribing is 11% brand-name and 88% generic drugs by claim count, with $752K in brand drug costs.
Does Carolyn Jachna, MD prescribe opioids? ▼
Yes, Carolyn Jachna, MD had 215 opioid claims in 2023 with an opioid prescribing rate of 2.2%.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,852 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Carolyn Jachna, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Carolyn Jachna, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Carolyn Jachna, MD accept Medicare? ▼
Carolyn Jachna, MD appears in CMS Medicare data with 9,639 Part D claims and 1,092 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Carolyn Jachna, MD's credentials? ▼
Carolyn Jachna, MD's NPI is 1558378216 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.