NPI registry status
Active
2026 NPPES data Hematology & Oncology Physician NPI 1316181241 MD
Verify on CMS → Grant Williams, MD
Hematology & Oncology Physician in Birmingham, Alabama.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,530 in Hematology & Oncology 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
640
Medicare Part D claims · 122 beneficiaries · Hematology & Oncology Physician avg: 885
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$56.6K
157 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Grant Williams, MD filed 640 Medicare Part D claims in 2024 as a Hematology & Oncology Physician in Birmingham, Alabama, prescribing 88% generic.
- 640
- Part D claims, 2024
- 88%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥68th
- 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 Grant Williams, MD
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 1316181241), first enumerated 04/22/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 640 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$56.6K in reported industry payments (157 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1316181241 · Hematology & Oncology Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1316181241
- ENUM-MID 2009
- TAX-MID 12K Hematology &
- RX-LIGHT 640
- BOOK-THIN 145 in Alabama
- PHOTO-ENUM Michael Green, MD · 2009
Grant Williams, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
640 ≥ 68th percentile 68% 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 certification likely (heuristic, not verified)
Grant Williams, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Grant Williams, MD?
Quality data not reportedPrimary specialty
Hematology & Oncology Physician
Medicare Part D claims
640 28% vs specialty avg
Specialty distribution in Alabama
How Hematology & Oncology Physician compares to other specialties among Alabama 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 Hematology & Oncology 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 | 1316181241 |
|---|---|
| Specialty | Hematology & Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 04/22/2009 |
Hospital and facility affiliations
Facilities where Grant Williams, 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.
DCH Healthcare Authority
Tuscaloosa, AL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Grant Williams, MD. Source: openpaymentsdata.cms.gov.
Total received
$56.6K
Largest payer
Takeda Pharmaceuticals U.S.A., 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.
Brand vs generic prescribing mix · Typical
Grant Williams, MD - brand share 12.0%
Hematology & Oncology Physician average
12% brand-name claims vs 88% generic, on 640 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.
640
Total Claims
$1.0M
Total Drug Cost
122
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 680.067
- Total Day Supply
- 14,304
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $785K
- Generic Drug Cost
- $229K
- Opioid Claims
- 115 (18.0% rate)
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 70.3 years
- Avg HCC Risk Score
- 2.15
- Gender Split
- 51% female / 49% male
- Age Distribution
- <65: 21, 65-74: 59, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Grant Williams, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Ondansetron Hcl
Ondansetron Hcl
81 claims
- Prochlorperazine M…
Prochlorperazine Maleate
65 claims
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
56 claims
- Lidocaine-Prilocaine
Lidocaine-Prilocaine
34 claims
- Letrozole
Letrozole
33 claims
- Prednisone 25
Prednisone
25 claims
- Abiraterone Acetate 20
Abiraterone Acetate
20 claims
- Oxycodone-Acetamin… 20
Oxycodone-Acetaminophen
20 claims
| Drug | Claims |
|---|---|
| Ondansetron Hcl | 81 |
| Prochlorperazine Maleate | 65 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 56 |
| Lidocaine-Prilocaine Lidocaine/Prilocaine | 34 |
| Letrozole | 33 |
| Prednisone | 25 |
| Abiraterone Acetate | 20 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 20 |
| Levothyroxine Sodium | 19 |
| Eliquis Apixaban | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Hematology & Oncology Physician Overview
How Grant Williams, MD fits within the Hematology & Oncology Physician landscape nationally.
11,530
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
885
Avg Claims per Provider
Grant Williams, MD's 640 claims are below the specialty average of 885.
Nationwide Hematology & Oncology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Williams, both outside Alabama so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Hematology & Oncology Physician Providers in Alabama
Other clinicians with the same primary specialty enrolled in Alabama, drawn from the same CMS NPPES roster as Williams.
One of 145 Hematology & Oncology Physician providers enrolled in Alabama, 5 are shown here.
Dr. Brian Abbott
MD
Brownsboro, AL
Dr. Ahmed Abdalla
M.D
Mobile, AL
Dr. Brian Adler
M.D.
Birmingham, AL
Dr. Nino Aleksidze
M.D.
Montgomery, AL
Dr. Shawnta Anakwah
M.D.
Gadsden, AL
Compare Hematology & Oncology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Grant Williams, MD's specialty? ▼
Grant Williams, MD specializes in Hematology & Oncology Physician and practices in Birmingham, Alabama. Credentials: MD.
How much does Grant Williams, MD prescribe under Medicare Part D? ▼
In 2024, Grant Williams, MD wrote 640 Medicare Part D claims totaling $1.0M in drug costs for 122 beneficiaries.
Where is Grant Williams, MD located? ▼
Grant Williams, MD is located at 2000 6TH AVE S, Birmingham, AL, 35233. Phone: (205) 934-9999.
What is Grant Williams, MD's NPI number? ▼
Grant Williams, MD's National Provider Identifier (NPI) is 1316181241, issued on 04/22/2009.
Does Grant Williams, MD prescribe more brand-name or generic drugs? ▼
Grant Williams, MD's prescribing is 12% brand-name and 88% generic drugs by claim count, with $785K in brand drug costs.
Does Grant Williams, MD prescribe opioids? ▼
Yes, Grant Williams, MD had 115 opioid claims in 2024 with an opioid prescribing rate of 18.0%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,530 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 885 Medicare Part D claims per year.
What drugs does Grant Williams, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Grant Williams, MD's most frequently prescribed drugs include Ondansetron Hcl, Prochlorperazine Maleate, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Grant Williams, MD accept Medicare? ▼
Grant Williams, MD appears in CMS Medicare data with 640 Part D claims and 122 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Grant Williams, MD's credentials? ▼
Grant Williams, MD's NPI is 1316181241 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.
- 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.