2026 NPPES data Ambulatory Care Pharmacist NPI 1336767920
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AMY CHWA

Ambulatory Care Pharmacist in BALTIMORE, Maryland. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
536
Medicare Part D claims · 119 beneficiaries · Ambulatory Care Pharmacist avg: 492
Generic prescribing
54%
generic claims · 46% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: AMY CHWA is a Ambulatory Care Pharmacist ([object Object]) practicing in BALTIMORE, Maryland with a Medicare Part D prescribing footprint of 536 claims across 119 beneficiaries — 46% brand-name prescribing .

What stands out: AMY CHWA filed 536 Medicare Part D claims in 2023 across BALTIMORE, Maryland. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

AMY CHWA at a glance

Quality data not reported

NPI registry status

Active

Issued 07/09/2020

NPI 1336767920

Primary specialty

Ambulatory Care Pharmacist

Niche

3,473 US NPIs in this specialty

Medicare Part D claims

536 9% vs specialty avg

2023 prescription claims

Specialty avg: 492

Specialty distribution in Maryland

How Ambulatory Care Pharmacist compares to other specialties among Maryland providers

Maryland providers

Ambulatory Care Pharmacist share within Maryland

1. Ambulatory Care Pharmacist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ambulatory Care Pharmacist share within Maryland

Specialty board-certification context

Estimated specialty board-certified rate — Ambulatory Care Pharmacist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ambulatory Care Pharmacist ABMS/AOA estimate

Est. board-certified rate (Ambulatory Care Pharmacist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ambulatory Care Pharmacist) — ABMS / AOA estimate

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).

AMY CHWA is a Ambulatory Care Pharmacist provider practicing in BALTIMORE, Maryland, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1336767920. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

AMY CHWA appears in the CMS NPPES registry as a Ambulatory Care Pharmacist provider at 600 N WOLFE ST, BALTIMORE, MD, 21287, with a listed phone of (410) 955-6874. NPI 1336767920 was issued on 07/09/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHWA most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 536 prescription claims written by this provider, covering 119 Medicare beneficiaries and totaling roughly $123K in drug spend, split 46% brand-name and 54% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Ambulatory Care Pharmacist is a narrow specialty nationwide, with 3,473 enrolled providers across 52 states and an average of 492 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

600 N WOLFE ST
BALTIMORE, MD 21287

Provider Details

NPI 1336767920
Specialty Ambulatory Care Pharmacist
Gender Female
NPI Issued 07/09/2020

Brand vs generic prescribing mix · Above average

AMY CHWA — brand share 46.0%
Specialty average (est.)

46% brand-name claims vs 54% generic, on 536 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.

536
Total Claims
$123K
Total Drug Cost
119
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,492
Total Day Supply
44,666
Brand vs Generic
46% brand / 54% generic
Brand Drug Cost
$119K
Generic Drug Cost
$4K

Patient Demographics

Average Patient Age
70.6 years
Avg HCC Risk Score
1.25
Gender Split
49% female / 51% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Metformin Hcl Er
Metformin Hcl
70
Jardiance
Empagliflozin
66
Humulin N
Insulin Nph Human Isophane
55
Glipizide
45
Metformin Hcl
39
Victoza 2-Pak
Liraglutide
37
Atorvastatin Calcium
32
Ozempic
Semaglutide
25
Glipizide Er
Glipizide
17
Lisinopril
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ambulatory Care Pharmacist Overview

How AMY CHWA fits within the Ambulatory Care Pharmacist landscape nationally.

3,473
Ambulatory Care Pharmacist Providers in US
52
States with Ambulatory Care Pharmacist
492
Avg Claims per Provider

AMY CHWA's 536 claims are above the specialty average of 492.

Nearby Ambulatory Care Pharmacist Providers in Maryland

Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as CHWA.

Compare Ambulatory Care Pharmacist nationally: see state-by-state distribution →

Frequently Asked Questions

What is AMY CHWA's specialty?
AMY CHWA specializes in Ambulatory Care Pharmacist and practices in BALTIMORE, Maryland.
How much does AMY CHWA prescribe under Medicare Part D?
In 2023, AMY CHWA wrote 536 Medicare Part D claims totaling $123K in drug costs for 119 beneficiaries.
Where is AMY CHWA located?
AMY CHWA is located at 600 N WOLFE ST, BALTIMORE, MD, 21287. Phone: (410) 955-6874.
What is AMY CHWA's NPI number?
AMY CHWA's National Provider Identifier (NPI) is 1336767920, issued on 07/09/2020.
Does AMY CHWA prescribe more brand-name or generic drugs?
AMY CHWA's prescribing is 46% brand-name and 54% generic drugs by claim count, with $119K in brand drug costs.
How many Ambulatory Care Pharmacist providers are there in the US?
There are 3,473 Ambulatory Care Pharmacist providers across 52 states in the US. The average Ambulatory Care Pharmacist provider writes 492 Medicare Part D claims per year.
What drugs does AMY CHWA prescribe most often?
Based on 2023 Medicare Part D data, AMY CHWA's most frequently prescribed drugs include Metformin Hcl Er, Jardiance, Humulin N. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AMY CHWA accept Medicare?
AMY CHWA appears in CMS Medicare data with 536 Part D claims and 119 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AMY CHWA's credentials?
AMY CHWA's NPI is 1336767920. 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

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