William N. Barker Jr., ACNP
- Medicare patients, 2024
- 242
- Part D claims, 2024
- 3,558
- Hospital affiliations
- 1
- Industry payments
- $79
- Medical group
- 1
- Practice address
- 700 E Marshall Ave, Longview, TX 75601
- Practice phone
- Call (903) 315-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Good Shepherd Medical Center - Longview
Longview, Texas
Find William Barker's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
William N. Barker Jr. is an acute care nurse practitioner in Longview, Texas
William Barker practices at Good Shepherd Medical Center - Longview in Longview, Texas.
William Barker's NPI, 1457501025, was assigned on September 19, 2008. William Barker holds Texas license AP117340.
- NPI
- 1457501025NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537211370
- NPI enumeration date
- September 19, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (903) 315-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 44
- Medical school graduation
- 2008
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
William N. Barker Jr. practices at Good Shepherd Medical Center - Longview in Longview, Texas
William Barker's primary practice is Good Shepherd Medical Center - Longview, at 700 E Marshall Ave, Longview, TX 75601 in Gregg County. The practice phone is (903) 315-2000.
- Good Shepherd Medical Center - Longview700 E Marshall Ave, Longview, TX 75601 · Gregg CountyPhone(903) 315-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
William N. Barker Jr. is affiliated with 3 sites of care and 1 medical group
William Barker's primary practice is Good Shepherd Medical Center - Longview in Longview, Texas. William Barker is also affiliated with CHRISTUS Good Shepherd Medical Center - Longview. The medical group on file is CHRISTUS Trinity Clinic. Dmand AI also links William Barker to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at William N. Barker Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Barker practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Good Shepherd Medical Center - Longview | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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William N. Barker Jr. is one of 2,587 acute care nurse practitioners in Texas
Acute care is William Barker's primary specialty in the NPI Registry, under taxonomy code 363LA2100X. William Barker is licensed in Texas.
Specialties and state licenses
- Acute care nurse practitioner, TexasPrimary
Acute care nurse practitioners near William Barker
Counts of acute care nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
William N. Barker Jr. treated 242 Medicare patients in 2024, average age 75
CMS counts 242 Medicare patients who saw William Barker in 2024. The largest group is 75 to 84, with 87 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.94, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts William Barker's median patient age at 68, with 46% women.
William Barker's Medicare patients by age, 2024
William Barker's Medicare patients by sex, 2024
- Women12050%
- Men12250%
Chronic conditions among William Barker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Heart failure64%
- Ischemic heart disease62%
- Arthritis48%
- Atrial fibrillation48%
- Diabetes46%
- Chronic kidney disease44%
Share of Medicare patients with each condition. A patient can have several.
William Barker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women46%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
William N. Barker Jr. wrote 3,558 Medicare Part D claims in 2024
In 2024, William Barker wrote 3,558 Medicare Part D claims for 538 patients. 73% of them were for generic drugs.
William Barker's Part D claims by kind of drug, 2024
- Generic2,587 claims73%
- Brand-name971 claims27%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How William N. Barker Jr. takes part in Medicare
William Barker accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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William N. Barker Jr. received $79 in industry payments in 2025
CMS Open Payments shows 2 general payments to William Barker from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Novartis Pharmaceuticals Corporation paid the most, $51.
Companies that paid William Barker the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for William N. Barker Jr.'s profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about William N. Barker Jr.
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William N. Barker Jr.'s NPI number?
William N. Barker Jr.'s NPI number is 1457501025. It was assigned on September 19, 2008, and it is active in the NPI Registry.
What does William N. Barker Jr. specialize in?
William N. Barker Jr. is an acute care nurse practitioner in Longview, Texas. The primary specialty in the NPI Registry is Acute Care Nurse Practitioner (taxonomy code 363LA2100X).
Where does William N. Barker Jr. practice?
William Barker practices at 700 E Marshall Ave, Longview, TX 75601. William Barker's primary practice is Good Shepherd Medical Center - Longview in Longview, Texas. Dmand AI also links William Barker to 1 group practice or clinic.
What is William N. Barker Jr.'s office phone number?
The practice phone on file for William Barker is (903) 315-2000.
What is William N. Barker Jr.'s medical license number?
William Barker holds Texas license AP117340.
Which hospitals is William N. Barker Jr. affiliated with?
William Barker is affiliated with CHRISTUS Good Shepherd Medical Center - Longview.
What medical group is William N. Barker Jr. part of?
William Barker is linked to CHRISTUS Trinity Clinic.
Does William N. Barker Jr. accept Medicare?
Yes. CMS lists William Barker as accepting Medicare assignment.
How many Medicare patients does William N. Barker Jr. see?
CMS counts 242 Medicare patients who saw William Barker in 2024, with an average age of 75.
Has William N. Barker Jr. received payments from drug or device companies?
CMS Open Payments shows $79 in general payments to William Barker from 2 companies from 2025 to 2025. The largest total came from Novartis Pharmaceuticals Corporation.
How long has William N. Barker Jr. been practicing?
William Barker graduated from medical school in 2008, 18 years ago.
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