NPI registry status
Active
2026 NPPES data Adult Psychiatric/Mental Health Clinical Nurse Specialist NPI 1689673956 PMHNP
Verify on CMS → Nancy Birtley, PMHNP
Adult Psychiatric/Mental Health Clinical Nurse Specialist in Saint Peters, 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 955 in Adult Psychiatric/Mental Health Clinical Nurse Specialist, 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 · 123 beneficiaries · Adult Psychiatric/Mental Health Clinical Nurse Specialist avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nancy Birtley, PMHNP filed 1,205 Medicare Part D claims in 2023 as a Adult Psychiatric/Mental Health Clinical Nurse Specialist in Saint Peters, Missouri.
- 1K
- Part D claims, 2023
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.
Nancy Birtley, PMHNP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,205 Top 22% higher than 78% 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
What does the federal data show about Nancy Birtley, PMHNP?
Quality data not reportedPrimary specialty
Adult Psychiatric/Mental Health Clinical Nurse Specialist
Medicare Part D claims
1,205 8% vs specialty avg
Specialty distribution in Missouri
How Adult Psychiatric/Mental Health Clinical Nurse Specialist 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 Adult Psychiatric/Mental Health Clinical Nurse Specialist. 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).
Nancy Birtley, PMHNP appears in the CMS NPPES registry as an Adult Psychiatric/Mental Health Clinical Nurse Specialist provider holding PMHNP credentials at 6209 MID RIVERS MALL DR, Saint Peters, MO, 63304, with a listed phone of (636) 244-4500. NPI 1689673956 was issued on 07/19/2005.
Medicare Part D records for calendar year 2023 show 1,205 prescription claims written by this provider, covering 123 Medicare beneficiaries and totaling roughly $19K in drug spend.
Adult Psychiatric/Mental Health Clinical Nurse Specialist is a narrow specialty nationwide, with 955 enrolled providers across 51 states and an average of 1,309 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 | 1689673956 |
|---|---|
| Specialty | Adult Psychiatric/Mental Health Clinical Nurse Specialist |
| Credentials | PMHNP |
| Gender | Female |
| NPI Issued | 07/19/2005 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,205
Total Claims
$19K
Total Drug Cost
123
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,223
- Total Day Supply
- 17,189
- Generic Drug Cost
- $16K
Patient Demographics
- Average Patient Age
- 84.6 years
- Avg HCC Risk Score
- 1.95
- Gender Split
- 75% female / 25% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Nancy Birtley, PMHNP prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sertraline Hcl
Sertraline Hcl
404 claims
- Trazodone Hcl
Trazodone Hcl
195 claims
- Duloxetine Hcl 97
Duloxetine Hcl
97 claims
- Divalproex Sodium 72
Divalproex Sodium
72 claims
- Quetiapine Fumarate 69
Quetiapine Fumarate
69 claims
- Fluoxetine Hcl 45
Fluoxetine Hcl
45 claims
- Risperidone 44
Risperidone
44 claims
- Bupropion Hcl Sr 42
Bupropion Hcl Sr
42 claims
| Drug | Claims |
|---|---|
| Sertraline Hcl | 404 |
| Trazodone Hcl | 195 |
| Duloxetine Hcl | 97 |
| Divalproex Sodium | 72 |
| Quetiapine Fumarate | 69 |
| Fluoxetine Hcl | 45 |
| Risperidone | 44 |
| Bupropion Hcl Sr Bupropion Hcl | 42 |
| Donepezil Hcl | 42 |
| Escitalopram Oxalate | 37 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Adult Psychiatric/Mental Health Clinical Nurse Specialist in MO →
All providers in Missouri →
Compare specialties →
Adult Psychiatric/Mental Health Clinical Nurse Specialist Overview
How Nancy Birtley, PMHNP fits within the Adult Psychiatric/Mental Health Clinical Nurse Specialist landscape nationally.
955
Adult Psychiatric/Mental Health Clinical Nurse Specialist Providers in US
51
States with Adult Psychiatric/Mental Health Clinical Nurse Specialist
1,309
Avg Claims per Provider
Nancy Birtley, PMHNP's 1,205 claims are below the specialty average of 1,309.
Nearby Adult Psychiatric/Mental Health Clinical Nurse Specialist Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Birtley.
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 Adult Psychiatric/Mental Health Clinical Nurse Specialist 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 Nancy Birtley, PMHNP's specialty? ▼
Nancy Birtley, PMHNP specializes in Adult Psychiatric/Mental Health Clinical Nurse Specialist and practices in Saint Peters, Missouri. Credentials: PMHNP.
How much does Nancy Birtley, PMHNP prescribe under Medicare Part D? ▼
In 2023, Nancy Birtley, PMHNP wrote 1,205 Medicare Part D claims totaling $19K in drug costs for 123 beneficiaries.
Where is Nancy Birtley, PMHNP located? ▼
Nancy Birtley, PMHNP is located at 6209 MID RIVERS MALL DR, Saint Peters, MO, 63304. Phone: (636) 244-4500.
What is Nancy Birtley, PMHNP's NPI number? ▼
Nancy Birtley, PMHNP's National Provider Identifier (NPI) is 1689673956, issued on 07/19/2005.
How many Adult Psychiatric/Mental Health Clinical Nurse Specialist providers are there in the US? ▼
There are 955 Adult Psychiatric/Mental Health Clinical Nurse Specialist providers across 51 states in the US. The average Adult Psychiatric/Mental Health Clinical Nurse Specialist provider writes 1,309 Medicare Part D claims per year.
What drugs does Nancy Birtley, PMHNP prescribe most often? ▼
Based on 2023 Medicare Part D data, Nancy Birtley, PMHNP's most frequently prescribed drugs include Sertraline Hcl, Trazodone Hcl, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nancy Birtley, PMHNP accept Medicare? ▼
Nancy Birtley, PMHNP appears in CMS Medicare data with 1,205 Part D claims and 123 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nancy Birtley, PMHNP's credentials? ▼
Nancy Birtley, PMHNP's NPI is 1689673956 with credentials PMHNP. 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.