Dr. Chad Edward Maclachlan , MD
Orthopaedic Surgery • Vallejo, CA
975 Sereno Dr
Vallejo, CA 945892441
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Chad Maclachlan is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on November 14, 2006; this date does not establish years in practice.
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Published CMS data list 57 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Oxycodone Hcl — 35 prescription fills, including refills.
- Ondansetron Odt (Ondansetron) — 22 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Fewer Part D prescriptions than 70% of clinicians listed under Orthopaedic Surgery in California (2024, 1,127 clinicians with data). Median for this group: 139. Middle half: 45 to 347.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part D prescriptions went from 60 in 2020 to 57 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
975 Sereno Dr
Vallejo, CA 945892441
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Permanente Medical Group Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
2002
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
57 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$398 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
24 years (graduated 2002)
CMS Doctors and Clinicians data list 2002 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Maclachlan has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Maclachlan as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Vallejo and California
Billing and prescribing volume is not a quality rating.
Medicare Part D prescriptions
Fewer Part D prescriptions than 70% of clinicians listed under Orthopaedic Surgery in California (2024, 1,127 clinicians with data). Median for this group: 139. Middle half: 45 to 347.
Too few clinicians listed under Orthopaedic Surgery in Vallejo have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 70% of clinicians listed under Orthopaedic Surgery in California (2024, 1,127 clinicians with data). Median for this group: $1,206. Middle half: $350 to $3,508.
Too few clinicians listed under Orthopaedic Surgery in Vallejo have Medicare Part D data for 2024 to compare.
16 active clinicians are listed under Orthopaedic Surgery with a practice address in Vallejo, CA (2,261 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Vallejo
6.2% of these 16 clinicians have the CMS telehealth indicator.
43.8% of these 16 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions varied from year to year: 60 in 2020 and 57 in 2024.
- 2020: 60
- 2021: 46
- 2022: 36
- 2023: 42
- 2024: 57
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30-day fills
30-day fills varied from year to year: 60 in 2020 and 57 in 2024.
- 2020: 60
- 2021: 46
- 2022: 36
- 2023: 42
- 2024: 57
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Part D drug cost
Part D drug cost went from $546 in 2020 to $398 in 2024.
- 2020: $546
- 2021: $321
- 2022: $241
- 2023: $726
- 2024: $398
Sources: CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 35 | 176 | $261.49 | 27 |
| Ondansetron Odt | Ondansetron | 22 | 74 | $136.94 | 22 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2021-12-21NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20080418000536
CA
4183713423
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
Permanente Medical Group Inc
975 Sereno Dr, Vallejo, CA 945892441
Phone: 7076511000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Sports Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 975 SERENO DR, VALLEJO, CA 945892441 (Tel: 7755883636)
Registered at 975 SERENO DR, VALLEJO, CA 945892441 (Tel: 4156211140)
NPI status registered as active in NPPES database
Registered at 212 ELKS POINT RD, SUITE 200, ZEPHYR COVE, NV 89448 (Tel: 7755883636)
Registered at 32A LYON ST, SAN FRANCISCO, CA 941173024 (Tel: 4156211140)
Recorded as CHAD MACLACHLAN, MD
Orthopaedic Surgery (license number reported to NPPES: CA A87183)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Vallejo
- Dr. Steven Mcgrath, MD
- Dr. Linda Specht, MD
- Dr. David Osborne, MD
- Dr. Yassamin Hazrati, MD
- Austin Thomas
- Dr. Noel Palumbo, MD
Mailing Address
975 Sereno Dr
Vallejo, CA 945892441
Phone: 4156211140