NPI registry status
Active
2026 NPPES data Developmental - Behavioral Pediatrics Physician NPI 1255453627 M.D.
Verify on CMS → Leonard Baker, M.D.
Developmental - Behavioral Pediatrics Physician in La Canada, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 974 in Developmental - Behavioral Pediatrics 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
225
Medicare Part D claims · 11 beneficiaries · Developmental - Behavioral Pediatrics Physician avg: 168
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$877.61
52 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Leonard Baker, M.D. filed 225 Medicare Part D claims in 2024 as a Developmental - Behavioral Pediatrics Physician in La Canada, California, prescribing 94% generic.
- 225
- Part D claims, 2024
- 94%
- generic prescribing
- $877.61
- industry payments (Sunshine Act)
- ≥48th
- 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 Leonard Baker, 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 1255453627), first enumerated 04/04/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 225 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$877.61 in reported industry payments (52 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Leonard Baker, M.D.'s individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- 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 1255453627 · Developmental - Behavioral Pediatrics Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1255453627
- ENUM-MID 2007
- TAX-NARROW 974
- RX-LIGHT 225
- BOOK-THIN 107 in California
- PHOTO-ENUM Adrienne Chipps, M.D · 2007
Leonard Baker, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
225 ≥ 48th percentile 48% 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-eligible specialty (heuristic, not verified)
Leonard Baker, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Leonard Baker, M.D.?
Quality data not reportedPrimary specialty
Developmental - Behavioral Pediatrics Physician
Medicare Part D claims
225 34% vs specialty avg
Specialty distribution in California
How Developmental - Behavioral Pediatrics Physician compares to other specialties among California 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 Developmental - Behavioral Pediatrics 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 | 1255453627 |
|---|---|
| Specialty | Developmental - Behavioral Pediatrics Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/04/2007 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Leonard Baker, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$878
Largest payer
Supernus Pharmaceuticals, Inc.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - California MBC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Leonard Baker, M.D.. To verify Leonard Baker, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Leonard Baker, M.D. - brand share 6.0%
Developmental - Behavioral Pediatrics Physician average
6% brand-name claims vs 94% generic, on 225 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.
225
Total Claims
$17K
Total Drug Cost
11
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 295.067
- Total Day Supply
- 8,685
- Brand vs Generic
- 6% brand / 94% generic
- Brand Drug Cost
- $8K
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 45.7 years
- Avg HCC Risk Score
- 0.43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Leonard Baker, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Dexmethylphenidate…
Dexmethylphenidate Hcl Er
27 claims
- Escitalopram Oxalate
Escitalopram Oxalate
21 claims
- Propranolol Hcl
Propranolol Hcl
18 claims
- Memantine Hcl
Memantine Hcl
14 claims
- Citalopram Hbr
Citalopram Hbr
13 claims
- Oxcarbazepine
Oxcarbazepine
12 claims
- Dexmethylphenidate…
Dexmethylphenidate Hcl
11 claims
| Drug | Claims |
|---|---|
| Dexmethylphenidate Hcl Er Dexmethylphenidate Hcl | 27 |
| Escitalopram Oxalate | 21 |
| Propranolol Hcl | 18 |
| Memantine Hcl | 14 |
| Citalopram Hbr Citalopram Hydrobromide | 13 |
| Oxcarbazepine | 12 |
| Dexmethylphenidate Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Developmental - Behavioral Pediatrics Physician in CA →
All providers in California →
Compare specialties →
Developmental - Behavioral Pediatrics Physician Overview
How Leonard Baker, M.D. fits within the Developmental - Behavioral Pediatrics Physician landscape nationally.
974
Developmental - Behavioral Pediatrics Physician Providers in US
52
States with Developmental - Behavioral Pediatrics Physician
168
Avg Claims per Provider
Leonard Baker, M.D.'s 225 claims are above the specialty average of 168.
Nationwide Developmental - Behavioral Pediatrics Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Baker, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Developmental - Behavioral Pediatrics Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Baker.
One of 107 Developmental - Behavioral Pediatrics Physician providers enrolled in California, 5 are shown here.
Frequently Asked Questions
What is Leonard Baker, M.D.'s specialty? ▼
Leonard Baker, M.D. specializes in Developmental - Behavioral Pediatrics Physician and practices in La Canada, California. Credentials: M.D..
How much does Leonard Baker, M.D. prescribe under Medicare Part D? ▼
In 2024, Leonard Baker, M.D. wrote 225 Medicare Part D claims totaling $17K in drug costs for 11 beneficiaries.
Where is Leonard Baker, M.D. located? ▼
Leonard Baker, M.D. is located at 1346 FOOTHILL BLVD STE 301, La Canada, CA, 91011. Phone: (818) 790-1587.
What is Leonard Baker, M.D.'s NPI number? ▼
Leonard Baker, M.D.'s National Provider Identifier (NPI) is 1255453627, issued on 04/04/2007.
Does Leonard Baker, M.D. prescribe more brand-name or generic drugs? ▼
Leonard Baker, M.D.'s prescribing is 6% brand-name and 94% generic drugs by claim count, with $8K in brand drug costs.
How many Developmental - Behavioral Pediatrics Physician providers are there in the US? ▼
There are 974 Developmental - Behavioral Pediatrics Physician providers across 52 states in the US. The average Developmental - Behavioral Pediatrics Physician provider writes 168 Medicare Part D claims per year.
What drugs does Leonard Baker, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Leonard Baker, M.D.'s most frequently prescribed drugs include Dexmethylphenidate Hcl Er, Escitalopram Oxalate, Propranolol Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Leonard Baker, M.D. accept Medicare? ▼
Leonard Baker, M.D. appears in CMS Medicare data with 225 Part D claims and 11 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Leonard Baker, M.D.'s credentials? ▼
Leonard Baker, M.D.'s NPI is 1255453627 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.