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Dr. Chad Edward Maclachlan , MD

Orthopaedic Surgery • Vallejo, CA

Active NPI 1154493427 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

975 Sereno Dr
Vallejo, CA 945892441

Call 7755883636 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

975 Sereno Dr

Vallejo, CA 945892441

Telephone 7755883636
Fax 7755881299
Organization at the Same NPPES Address or Phone
Kaiser Permanente Vallejo Facility NPI 1801983150

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

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

Graduation Year

2002

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.

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.

Guide: How to read an Open Payments record

Years since graduation

24 years (graduated 2002)

CMS Doctors and Clinicians data list 2002 as the year this clinician finished professional 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.

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?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

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.

Guide: What Medicare enrollment (PECOS) means

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.

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.

Guide: What ordering and referring status means

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.

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.

CMS Part D · Data Year 2024
Prescription Year:
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: 2021-12-21
Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

License # reported to NPPES CA A87183

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - ORTHOPEDIC SURGERY

Medicare Enrollment ID

I20080418000536

Enrollment State Jurisdiction

CA

PECOS Control ID

4183713423

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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.

4 listed
Dr. Jonathan Hagen , MD

Orthopaedic Surgery

NPI 1487915153

Doctor of Medicine (M.D.)

Dr. Robert Rupp , MD

Orthopaedic Surgery - Sports Medicine

NPI 1558360628

Doctor of Medicine (M.D.)

Dr. Keith Swanson , MD

Orthopaedic Surgery - Sports Medicine

NPI 1255330312

Doctor of Medicine (M.D.)

Dr. Randy Watson , MD

Orthopaedic Surgery - Sports Medicine

NPI 1487653655

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

8 Historical Events
📍
Updated Practice Location December 21, 2021

Registered at 975 SERENO DR, VALLEJO, CA 945892441 (Tel: 7755883636)

📍
Updated Business Mailing Address March 12, 2021

Registered at 975 SERENO DR, VALLEJO, CA 945892441 (Tel: 4156211140)

✅
NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍
Practice Location (Initial Record) July 08, 2007

Registered at 212 ELKS POINT RD, SUITE 200, ZEPHYR COVE, NV 89448 (Tel: 7755883636)

📍
Business Mailing Address (Initial Record) July 08, 2007

Registered at 32A LYON ST, SAN FRANCISCO, CA 941173024 (Tel: 4156211140)

👤
Provider Name / Credentials (Initial Record) July 08, 2007

Recorded as CHAD MACLACHLAN, MD

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Orthopaedic Surgery (license number reported to NPPES: CA A87183)

🟢
Initial NPI Registration & Enumeration November 14, 2006

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1154493427
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: November 14, 2006
Last Update: December 21, 2021
Sole Proprietor: No

Other Orthopaedic Surgery Specialists in Vallejo

All Orthopaedic Surgery Specialists in Vallejo

Mailing Address

975 Sereno Dr

Vallejo, CA 945892441

Phone: 4156211140

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.