James William Tinkelenberg, PA-C

  • Mad River, CA
  • Physician assistant
NPI1205978392PAC ID9830379379
Medicare services, 2024
75
Medicare patients, 2024
43
Part D claims, 2024
5,553
Hospital affiliations
4
Industry payments
$271
Practice address
321 Van Duzen Rd, Mad River, CA 95526
Practice phone
Call (707) 574-6616
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

The Wecare Group, Inc.

Mad River, California

See all 6 affiliations

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James William Tinkelenberg is a physician assistant in Mad River, California

James Tinkelenberg practices at The Wecare Group, Inc. in Mad River, California.

James Tinkelenberg's NPI, 1205978392, was assigned on February 13, 2007. James Tinkelenberg graduated from University of California, Davis School of Medicine in 2006. James Tinkelenberg holds California license 19044.

NPI and contact details
Medicare PAC ID
9830379379
NPI enumeration date
February 13, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(707) 574-6616
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
46
Medical school graduation
2006

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

James William Tinkelenberg practices at The Wecare Group, Inc. in Mad River, California

James Tinkelenberg's primary practice is The Wecare Group, Inc., at 321 Van Duzen Rd, Mad River, CA 95526 in Humboldt County. The practice phone is (707) 574-6616.

  • The Wecare Group, Inc.
    321 Van Duzen Rd, Mad River, CA 95526 · Humboldt CountyPhone(707) 574-6616

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

James William Tinkelenberg is affiliated with 5 sites of care and 1 medical group

James Tinkelenberg's primary practice is The Wecare Group, Inc. in Mad River, California. James Tinkelenberg is also affiliated with Providence St. Joseph Hospital Eureka. The medical group on file is WeCare Health Services. Dmand AI also links James Tinkelenberg to 3 more hospitals, each named with a free account.

See all 6 affiliations for James Tinkelenberg

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at James William Tinkelenberg's practice

Dmand AI tracks the electronic health record (EHR) system at each site where James Tinkelenberg practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
The Wecare Group, Inc.Available with a free account
+4 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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James William Tinkelenberg is one of 11,482 physician assistants in California

Physician assistant is James Tinkelenberg's primary specialty in the NPI Registry, under taxonomy code 363A00000X. James Tinkelenberg is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). James Tinkelenberg is licensed in California.

Specialties and state licenses

  • Physician assistant, CaliforniaPrimaryLicense 19044 · taxonomy 363A00000X

Clinical focus

Dmand AI lists anxiety, arthritis, asthma, bronchitis, bursitis, chronic kidney disease, chronic obstructive pulmonary disease (COPD) and contact dermatitis among the conditions James Tinkelenberg treats.

Physician assistants near James Tinkelenberg

Counts of physician assistants 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

James William Tinkelenberg billed Medicare for 75 services in 2024

CMS data shows 75 Medicare services from James Tinkelenberg across 1 procedure code in 2024, for 43 Medicare patients. Medicare paid $714 for them. Every service was in an office.

Medicare services, 202475
Medicare patients43
Paid by Medicare$714
Procedure codes1

James Tinkelenberg compared with the California median for physician assistants, 2024

  • James Tinkelenberg
  • California median
Medicare services
75vs 20463% below
Medicare patients
43vs 10559% below
Part D claims
4,871vs 24320.0 times

Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.

James Tinkelenberg's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by James Tinkelenberg

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

James William Tinkelenberg treated 43 Medicare patients in 2024, average age 69

CMS counts 43 Medicare patients who saw James Tinkelenberg in 2024. The largest group is 65 to 74, with 21 patients. 75% of them have high cholesterol, and 72% have diabetes. 53% are also on Medicaid. Their average risk score is 1.26, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts James Tinkelenberg's median patient age at 62, with 58% women.

Medicare patients, 202443
Average age69
Average risk score1.26
Also on Medicaid53%

James Tinkelenberg's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

James Tinkelenberg's Medicare patients by sex, 2024

  • Women2456%
  • Men1944%

Chronic conditions among James Tinkelenberg's Medicare patients, 2024

  1. High cholesterol75%
  2. Diabetes72%
  3. High blood pressure70%
  4. Arthritis44%
  5. COPD37%
  6. Depression33%
  7. Mood disorders33%
  8. Chronic kidney disease28%

Share of Medicare patients with each condition. A patient can have several.

James Tinkelenberg's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 62

Patient panel by sex, all payers

  • Women58%
  • Men42%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

James William Tinkelenberg wrote 5,553 Medicare Part D claims in 2024

In 2024, James Tinkelenberg wrote 5,553 Medicare Part D claims for 282 patients. 83% of them were for generic drugs. CMS names the drug for 4,871 of them, across 109 drugs with 11 or more claims each, at $534,455 in total drug cost.

Part D claims, 20245,553
Drugs named by CMS109
Total drug cost$534,455
Part D patients282

James Tinkelenberg's Part D claims by kind of drug, 2024

  • Generic4,607 claims83%
  • Brand-name924 claims17%
  • Other22 claims0%

James Tinkelenberg's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in James Tinkelenberg's Part D claims, 2024

  • Opioids8%458 of 5,553 claims
  • Antibiotics1%46 of 5,553 claims
  • Antipsychotics, patients 65 and over1%36 of 5,553 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by James Tinkelenberg

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

How James William Tinkelenberg takes part in Medicare

James Tinkelenberg 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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James William Tinkelenberg received $271 in industry payments from 2024 to 2025

CMS Open Payments shows 11 general payments to James Tinkelenberg from 8 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 92% of the total. Novo Nordisk Inc paid the most, $81.

General payments to James Tinkelenberg by program year, 2024 to 2025

General payments to James Tinkelenberg by kind, 2024 to 2025

$271in total
  • Food and beverage$24892%
  • Entertainment$238%

Companies that paid James Tinkelenberg the most, 2024 to 2025

Share is of all general payments to this clinician.

See all payments to James Tinkelenberg

Source: Open Payments (CMS), 2025 data, released July 7, 2026

James William Tinkelenberg graduated from University of California, Davis School of Medicine

James Tinkelenberg graduated from University of California, Davis School of Medicine in 2006. James Tinkelenberg is a member of AAPA.

  1. Medical schoolUniversity of California, Davis School of Medicine
  2. Board certified in certified physician assistantNational Commission on Certification of Physician Assistants (NCCPA)

Source: Dmand AI Professional Profile Data

Sources for James William Tinkelenberg's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about James William Tinkelenberg

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is James William Tinkelenberg's NPI number?

James William Tinkelenberg's NPI number is 1205978392. It was assigned on February 13, 2007, and it is active in the NPI Registry.

What does James William Tinkelenberg specialize in?

James William Tinkelenberg is a physician assistant in Mad River, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does James William Tinkelenberg practice?

James Tinkelenberg practices at 321 Van Duzen Rd, Mad River, CA 95526. James Tinkelenberg's primary practice is The Wecare Group, Inc. in Mad River, California. Dmand AI also links James Tinkelenberg to 3 hospitals.

What is James William Tinkelenberg's office phone number?

The practice phone on file for James Tinkelenberg is (707) 574-6616.

What is James William Tinkelenberg's medical license number?

James Tinkelenberg holds California license 19044.

Which hospitals is James William Tinkelenberg affiliated with?

James Tinkelenberg is affiliated with Providence St. Joseph Hospital Eureka. Dmand AI links James Tinkelenberg to 3 more hospitals.

What medical group is James William Tinkelenberg part of?

James Tinkelenberg is linked to WeCare Health Services.

Does James William Tinkelenberg accept Medicare?

Yes. CMS data shows James Tinkelenberg billed Medicare for 75 services in 2024, and James Tinkelenberg accepts Medicare assignment.

How many Medicare patients does James William Tinkelenberg see?

CMS counts 43 Medicare patients who saw James Tinkelenberg in 2024, with an average age of 69.

Is James William Tinkelenberg board certified?

Yes. James Tinkelenberg is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).

Show 5 more questionsShow fewer questions

What services does James William Tinkelenberg bill to Medicare?

In 2024, James Tinkelenberg's most billed Medicare services were lab and pathology test (83036).

Where did James William Tinkelenberg go to medical school?

James Tinkelenberg graduated from University of California, Davis School of Medicine in 2006.

What drugs does James William Tinkelenberg prescribe most?

In 2024 Medicare Part D data, James Tinkelenberg's most prescribed drugs by claims were Albuterol Sulfate Hfa, Atorvastatin Calcium and Gabapentin.

Has James William Tinkelenberg received payments from drug or device companies?

CMS Open Payments shows $271 in general payments to James Tinkelenberg from 8 companies from 2024 to 2025. The largest total came from Novo Nordisk Inc.

How long has James William Tinkelenberg been practicing?

James Tinkelenberg graduated from medical school in 2006, 20 years ago.

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