Physician

Armistead D Williams, M.D.

According to 2025 Medicare claims, Armistead Williams, M.D. (NPI: 1073580908) practices nephrology in the New York-Jersey City-White Plains, NY-NJ market, with the plurality of this provider's patient population coming from New York, NY. This provider's primary affiliated billing organization is INTERNATIONAL MULTIPLE SCLEROSIS MANAGEMENT PRACTICE, PC (NPI: 1528026028) and primary practice location at 10019-2929.

Williams' data goes back to 2015 and runs through 2024. For example, in 2024, this provider had 331 traditional Medicare patients, billed 184,686 HCPCS/CPT codes, and received $6,653,280 in Medicare payments. The top billing code was 99215 (Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more). Part D data shows 2,009 prescription claims across 153 beneficiaries totaling $2,590,532 in drug costs, led by Octagam (Immun Globg(Igg)/Malt/Iga Ov50). DME data shows 53 claims. No Open Payments records. You can download detailed data with all billing codes (2015-2024). For more recent data, please contact us.

Over the past 10 years, this provider's Medicare Part B carrier billing has moved from a lower plateau to a higher plateau, from $1,511,577 to $6,653,280. Similarly, Part D prescription costs have risen steadily, from $1,407,590 to $2,590,532. In contrast, DME billing represents a smaller volume and moved from a lower plateau to a higher plateau, from $41,631 to $59,543.

Part B Carrier Billing Trend

Medicare payment trend, with N of patients and claim lines in the table.

Year	Patients	Clm Lines	Payment
2015	269	42,965	$1,511,577
2016	288	55,381	$1,920,073
2017	330	56,366	$2,173,176
2018	357	78,480	$2,830,001
2019	359	135,314	$4,572,204
2020	332	144,588	$5,275,629
2021	347	175,776	$6,370,739
2022	334	177,896	$6,695,257
2023	326	183,825	$6,955,164
2024	331	184,686	$6,653,280

Part D Events Trend

Drug cost trend, with N of patients and prescription claims in the table.

Year	Patients	Claims	Drug Cost
2015	142	1,323	$1,407,590
2016	145	1,359	$1,726,319
2017	154	1,627	$1,873,070
2018	218	2,179	$2,180,578
2019	168	2,282	$2,395,636
2020	177	2,420	$2,327,271
2021	153	2,221	$2,655,237
2022	153	2,116	$2,305,898
2023	147	2,139	$2,882,348
2024	153	2,009	$2,590,532

DME Billing Trend

Medicare payment trend, with N of patients and DME claim records in the table.

Year	Patients	Claims	Payment
2015	N/R	52	$30,551
2016	N/R	76	$40,441
2017	N/R	75	$42,253
2018	N/R	116	$45,764
2019	N/R	97	$55,737
2020	N/R	139	$72,408
2021	N/R	127	$69,289
2022	N/R	114	$74,314
2023	N/R	81	$67,333
2024	N/R	53	$17,922

* / # = suppressed by CMS; 0 = reported zero; N/R = not reported or blank.

Top 5 Part B carrier billing codes in 2024

By total payments.

Code	Description	Patients	Clm Lines	Total Payment
99215	Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	170	284	$147
96413	Administration of chemotherapy into vein, 1 hour or less	148	385	$112
96374	Injection of drug or substance into vein	117	205	$32
96415	Administration of chemotherapy into vein, each additional hour	134	607	$24
J7040	Infusion, normal saline solution, sterile (500 ml = 1 unit)	98	214	$1

Top 5 Part D drugs in 2024

By total drug costs.

Drug	Generic	Claims	Total Day Supply	Total Drug Cost
Octagam	Immun Globg(Igg)/Malt/Iga Ov50	47	1,338	$725,095
Privigen	Immun Glob G(Igg)/Pro/Iga 0-50	13	364	$228,601
Rebif	Interferon Beta-1a/Albumin	14	392	$170,614
Gammagard Liquid	Immun Glob G(Igg)/Gly/Iga Ov50	24	672	$165,315
Hizentra	Immun Glob G(Igg)/Pro/Iga 0-50	14	392	$122,893

Top 5 DME services in 2024

By Total Medicare Payment Amount.

HCPCS Code	HCPCS Description	Supplier Rental Indicator	Total Supplier Beneficiaries	Total Supplier Claims	Total Medicare Payment Amount
E0466	Home ventilator, any type, used with non-invasive interface, (e.g., mask, chest shell)	Y	N/R	12	$12,065
A4351	Intermittent urinary catheter; straight tip, with or without coating (teflon, silicone, silicone elastomer, or hydrophilic, etc.), each	N	N/R	11	$3,260
K0739	Repair or nonroutine service for durable medical equipment other than oxygen equipment requiring the skill of a technician, labor component, per 15 minutes	N	N/R	19	$2,364
A4332	Lubricant, individual sterile packet, each	N	N/R	11	$233

Open Payments Summary

No connected Open Payments records were found for this physician in General Payments, Research Payments, or Ownership / Investment Interests.

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FAQ

What Medicare data is available for Armistead D. Williams, M.D.?

Tedicare shows public-source Medicare data for Armistead D. Williams, M.D. (NPI 1073580908), including provider identity, specialty, market context, Medicare Part B activity, Part D prescribing, DME records, Open Payments where available, billing organization details, and ACO affiliation signals where available. Profile data covers 2015-2024, with current attribution based on 2025 claims where available.

Does Armistead D. Williams, M.D. have ACO affiliation data?

No ACO affiliation record is shown in the available Tedicare data for this profile.

What billing organization is linked to Armistead D. Williams, M.D.?

Armistead D. Williams, M.D. is linked to INTERNATIONAL MULTIPLE SCLEROSIS MANAGEMENT PRACTICE, PC (billing NPI 1528026028) in the available physician profile data.

Does Armistead D. Williams, M.D. have Open Payments data?

No connected Open Payments records are shown for this physician in the available General Payments, Research Payments, or Ownership / Investment Interests data.

Can I download physician-level Medicare data from Tedicare?

Yes. Tedicare provides sample physician export data and paid custom physician data exports for research, planning, outreach, and market analysis. Exports can include physician profile fields, market and specialty context, billing organization details, ACO affiliation signals where available, and Medicare utilization data.